Idioms are fun phrases where the words together have a special meaning that is different from the literal meaning of each separate word. People use them in everyday conversations to make their speech colorful, engaging, and expressive. In this article, you will learn fifty interesting idioms about dishonesty, untruths, and telling a lie.
In this lesson, we’ll look at idioms that mean telling a falsehood, deceiving someone, or hiding the truth. Let us get started and explore some of these helpful expressions.
Idioms for Lie
1. Fabricate a story
Definition: To invent a completely false tale or explanation from scratch.
Used in a Sentence: When he failed to finish his homework, he tried to fabricate a story about his dog eating the notebook. / The suspect attempted to fabricate a story about where he was during the afternoon.
Similar Expressions: Make up a tale / Invent a falsehood
2. Fib about the details
Definition: To tell a small, harmless untruth about minor facts.
Used in a Sentence: She liked to fib about the details of how she won the baking contest just to sound impressive. / There is no need to fib about the details of your score; just tell the truth.
Similar Expressions: Stretch the truth / White lie
3. Spin a yarn
Definition: To tell a long, made-up, and usually exaggerated story.
Used in a Sentence: Grandpa loved to sit on the front porch and spin a yarn about his childhood adventures. / Do not believe everything he says because he loves to spin a yarn for tourists.
Similar Expressions: Tell a tall tale / Make up a narrative
4. Pull the wool over someone’s eyes
Definition: To trick or deceive a person into believing something untrue.
Used in a Sentence: The sneaky salesman tried to pull the wool over our eyes regarding the car’s broken engine. / You cannot pull the wool over my eyes with that obvious excuse.
Similar Expressions: Pull a fast one / Pull legs
5. Throw dust in someone’s eyes
Definition: To deliberately confuse or mislead someone to hide the real facts.
Used in a Sentence: During the debate, the politician tried to throw dust in the voters’ eyes with confusing statistics. / Do not let his complicated jargon throw dust in your eyes; check the facts.
Similar Expressions: Cloud the issue / Mislead the crowd
6. Lead someone down the garden path
Definition: To trick someone into believing a false hope or incorrect story over time.
Used in a Sentence: The dishonest contractor led us down the garden path about when the kitchen remodel would finish. / Do not let him lead you down the garden path with false promises of extra credit.
Similar Expressions: String someone along / Feed false hope
7. Sell someone a bill of goods
Definition: To trick someone into buying or believing something that turns out to be completely fake.
Used in a Sentence: The scammer sold the tourists a bill of goods about owning the historic landmark. / I realized too late that my friend had sold me a bill of goods about the rare baseball card.
Similar Expressions: Swindle someone / Trick a buyer
8. Blow smoke
Definition: To talk nonsense or tell boastful lies to hide your lack of knowledge.
Used in a Sentence: He pretended to know all about the computer code, but he was just blowing smoke. / Do not listen to his boasting; he is just blowing smoke to sound smart.
Similar Expressions: Talk nonsense / Bluff your way
9. Cook the books
Definition: To falsify financial records or data dishonestly.
Used in a Sentence: The dishonest manager tried to cook the books to hide the missing money from the store safe. / Auditors discovered that someone had cooked the books in the club treasury.
Similar Expressions: Falsify records / Alter accounts
10. Fudge the numbers
Definition: To alter data slightly so that it tells a more favorable lie.
Used in a Sentence: The researcher was caught trying to fudge the numbers on the science fair chart. / Never fudge the numbers on your math homework just to match the back of the book.
Similar Expressions: Alter data / Adjust stats
11. Pass off a fake
Definition: To convince someone that an imitation or false item is genuine.
Used in a Sentence: He tried to pass off a printed copy as an original historical document. / She attempted to pass off cubic zirconia as a real diamond ring.
Similar Expressions: Palm off a copy / Pretend it is real
12. Play fast and loose with the facts
Definition: To treat the truth carelessly and bend facts to suit your needs.
Used in a Sentence: The witness played fast and loose with the facts during the school court simulation. / Journalists must never play fast and loose with the facts in their reports.
Similar Expressions: Bend the truth / Play careless
13. Walk on slippery ground
Definition: To base your actions on falsehoods or untruths that are bound to fail.
Used in a Sentence: When he started lying to his parents about school, he knew he was walking on slippery ground. / Building an argument on false data means you are walking on slippery ground.
Similar Expressions: Tread on thin ice / Risk exposure
14. Keep a skeleton in the closet
Definition: To hide a shameful past secret or lie from public view.
Used in a Sentence: Every family has a skeleton in the closet that they prefer not to discuss with guests. / He was terrified that his old school prank secret would become public.
Similar Expressions: Hide a secret / Conceal past truth
15. Sweep something under the rug
Definition: To hide a mistake, lie, or embarrassing truth so people forget about it.
Used in a Sentence: The committee tried to sweep the budget error under the rug before the principal noticed. / You cannot just sweep your bad behavior under the rug and pretend it never happened.
Similar Expressions: Hide a mess / Conceal a mistake
16. Hide behind a mask
Definition: To conceal your true intentions and feelings behind a false, deceptive personality.
Used in a Sentence: He hid behind a mask of friendliness while spreading rumors behind her back. / Do not let her sweet demeanor fool you; she hides behind a mask of deception.
Similar Expressions: Wear a disguise / Conceal true self
17. Put on a false front
Definition: To pretend to be wealthier, happier, or more honest than you actually are.
Used in a Sentence: They put on a false front for the neighborhood, pretending everything was fine when they were struggling. / Stop putting on a false front and just admit you need help with the project.
Similar Expressions: Pretend success / Fake an image
18. Talk out of both sides of your mouth
Definition: To say one thing to one person and a completely different thing to another.
Used in a Sentence: You cannot talk out of both sides of your mouth and expect people to trust your word. / The dishonest club treasurer talked out of both sides of his mouth about the fundraiser cash.
Similar Expressions: Be two-faced / Speak deceitfully
19. Speak with a forked tongue
Definition: To say one thing while intending to deceive or betray someone.
Used in a Sentence: Native legends warned of leaders who spoke with a forked tongue during peace talks. / We realized our classmate spoke with a forked tongue when he blamed us for his mess.
Similar Expressions: Be deceitful / Speak untruths
20. Double-cross a friend
Definition: To betray someone after lying to them and gaining their trust.
Used in a Sentence: He felt terrible after he decided to double-cross his teammate in the card game tournament. / Never double-cross someone who trusted you with a secret.
Similar Expressions: Betray trust / Stab in back
21. Pull a fast one
Definition: To trick or swindle someone through a quick deception.
Used in a Sentence: He tried to pull a fast one by trading a broken toy for my brand-new action figure. / Do not let the card dealer pull a fast one on you during the magic trick.
Similar Expressions: Trick someone / Swindle fast
22. Play a trick on someone
Definition: To deceive someone playfully or maliciously with a prank or lie.
Used in a Sentence: On April Fool’s Day, the students loved to play a trick on their favorite teacher. / Playing a trick on your sister by hiding her shoes is not very nice.
Similar Expressions: Pull a prank / Deceive playfully
23. Lead someone up the garden path
Definition: To deceive someone into false expectations through misleading statements.
Used in a Sentence: The crooked guide led the hikers up the garden path regarding the distance to camp. / She led the committee up the garden path about having the posters ready.
Similar Expressions: Mislead someone / Feed false hope
24. Feed someone a line
Definition: To tell someone a rehearsed lie or an insincere excuse.
Used in a Sentence: He tried to feed me a line about why he forgot his textbook at home. / Do not buy his excuse; he is just feeding you a line to get out of chores.
Similar Expressions: Give an excuse / Tell a story
25. Tell a cock-and-bull story
Definition: To tell an absurd, unbelievable lie that sounds completely ridiculous.
Used in a Sentence: When caught sneaking cookies, he told a cock-and-bull story about a talking squirrel. / The police officer did not believe his cock-and-bull story about the missing bicycle.
Similar Expressions: Tell an absurd lie / Make up nonsense
26. Stretch the bow
Definition: To exaggerate a story or stretch the absolute truth beyond credibility.
Used in a Sentence: When describing how big the fish was, he always liked to stretch the bow a little. / Do not stretch the bow too much or people will stop believing your stories.
Similar Expressions: Exaggerate a fact / Stretch the truth
27. Pile it on thick
Definition: To exaggerate a lie or compliment so much that it becomes completely unbelievable.
Used in a Sentence: When trying to flatter the teacher, he piled it on thick until everyone laughed. / She piled the excuses on thick when explaining why her project was late.
Similar Expressions: Exaggerate wildly / Overdo a tale
28. Lay it on with a trowel
Definition: To exaggerate praise or untruths in a very obvious, clumsy way.
Used in a Sentence: He laid the compliments on with a trowel when he wanted to borrow my bicycle. / The politician laid his promises on with a trowel during the student election.
Similar Expressions: Exaggerate heavily / Lay it on thick
29. Talk through your hat
Definition: To speak authoritatively about something you know nothing about, spreading false ideas.
Used in a Sentence: Stop talking through your hat about space travel when you have not read the book. / He was just talking through his hat during the history debate.
Similar Expressions: Speak ignorantly / Bluff nonsense
30. Shoot from the lip
Definition: To speak carelessly without regard for whether what you say is true or false.
Used in a Sentence: He always shoots from the lip during committee meetings without checking his facts. / Do not shoot from the lip; verify the schedule before telling everyone.
Similar Expressions: Speak carelessly / Blurting untruths
31. Bark up the wrong tree
Definition: To accuse or suspect the wrong person based on false assumptions.
Used in a Sentence: If you think I stole your colored pencils, you are barking up the wrong tree. / The detective realized he was barking up the wrong tree when a new clue appeared.
Similar Expressions: Suspect wrongly / False accusation
32. Point the finger falsely
Definition: To blame an innocent person for a mistake or lie you committed.
Used in a Sentence: It is cowardly to point the finger at your little sister when you broke the lamp. / He tried to point the finger falsely to avoid getting detention.
Similar Expressions: Blame another / Shift fault
33. Pass the buck
Definition: To shift blame or responsibility for a lie onto someone else.
Used in a Sentence: Instead of admitting his mistake, the team captain tried to pass the buck to a rookie. / Stop trying to pass the buck and take responsibility for your broken promise.
Similar Expressions: Shift blame / Avoid responsibility
34. Wash your hands of something
Definition: To declare that you are no longer responsible for a lie or bad situation.
Used in a Sentence: After discovering the scam, she washed her hands of the whole fundraising project. / He washed his hands of the cheating scandal before it got out of hand.
Similar Expressions: Disown responsibility / Walk away
35. Turn a blind eye
Definition: To pretend you do not notice a lie or dishonest behavior happening right in front of you.
Used in a Sentence: The referee turned a blind eye to the minor foul during the soccer match. / You cannot just turn a blind eye when your friend cheats on a test.
Similar Expressions: Ignore dishonesty / Overlook a lie
36. Bury your head in the sand
Definition: To ignore an obvious lie or problem in the hope that it will go away.
Used in a Sentence: Burying your head in the sand will not make the failing grade disappear. / Stop burying your head in the sand and confront the broken promise.
Similar Expressions: Ignore reality / Avoid truth
37. Pull the rug out from under someone
Definition: To suddenly withdraw support or reveal a lie, causing someone to fail.
Used in a Sentence: Canceling the funding agreement pulled the rug out from under our club project. / Revealing his secret lie pulled the rug out from under his campaign.
Similar Expressions: Sabotage someone / Undermine support
38. Cut the ground from under someone
Definition: To ruin someone’s false argument or lie by exposing the truth first.
Used in a Sentence: Her evidence cut the ground from under his excuse for missing class. / The smart detective cut the ground from under the suspect’s fake alibi.
Similar Expressions: Undermine an excuse / Expose a lie
39. Take someone for a ride
Definition: To deceive or cheat someone over an extended period.
Used in a Sentence: We realized the fake ticket vendor had taken us for a ride when we reached the gate. / Do not let him take you for a ride with those false investment promises.
Similar Expressions: Cheat someone / Swindle a mark
40. Lead someone by the nose
Definition: To control and manipulate someone completely through lies and deception.
Used in a Sentence: The clever ringleader led his followers by the nose into trouble. / You let your friends lead you by the nose into breaking curfew.
Similar Expressions: Manipulate someone / Control blindly
41. Hoodwink an audience
Definition: To deceive or trick an audience with clever falsehoods.
Used in a Sentence: The magician tried to hoodwink the crowd into thinking he had real superpowers. / The scam artist hoodwinked investors with fake oil well documents.
Similar Expressions: Trick a crowd / Deceive viewers
42. Pull the wool over the committee
Definition: To deceive a group of decision-makers with a false presentation.
Used in a Sentence: He tried to pull the wool over the school board regarding the missing funds. / You cannot pull the wool over the judges with a copied science project.
Similar Expressions: Deceive judges / Fool a board
43. Play possum
Definition: To pretend to be asleep, dead, or unaware to deceive someone.
Used in a Sentence: When his mother checked his bedroom at night, he played possum under the covers. / The injured player played possum on the grass to waste game time.
Similar Expressions: Fake unawareness / Play dead
44. Wear a false mustache
Definition: To use a disguise or literal fake appearance to hide your identity.
Used in a Sentence: The cartoon villain put on a false mustache to sneak back into the building. / You do not need a disguise to tell the truth; drop the act.
Similar Expressions: Use a disguise / Wear a fake
45. Put on an act
Definition: To pretend to feel or be someone you are not in order to deceive.
Used in a Sentence: Stop putting on an act of being brave when you are clearly terrified of the roller coaster. / She put on an act of surprise when we threw her a birthday party.
Similar Expressions: Pretend behavior / Fake an emotion
46. Shed crocodile tears
Definition: To fake sadness or crying to gain sympathy through a lie.
Used in a Sentence: He shed crocodile tears when his teacher caught him breaking the classroom window. / Do not fall for her crocodile tears; she is not actually sorry.
Similar Expressions: Fake crying / Insincere grief
47. Talk your way out of trouble
Definition: To use clever lies and smooth talking to escape punishment.
Used in a Sentence: He tried to talk his way out of detention by inventing a story about traffic. / You cannot always talk your way out of trouble when you break rules.
Similar Expressions: Fast talk / Argue an excuse
48. Bluff your way through
Definition: To succeed in a situation through deception and false confidence.
Used in a Sentence: Having forgotten to read the book, she tried to bluff her way through the oral report. / He bluffed his way through the trivia test by guessing with confidence.
Similar Expressions: Fake knowledge / Wing it
49. Ride on a false promise
Definition: To rely on assurances that someone never intended to keep.
Used in a Sentence: We spent weeks waiting for new equipment while riding on a false promise from the supplier. / Do not let your hopes ride on a false promise from a stranger.
Similar Expressions: Trust lies / Rely on fluff
50. Live a lie
Definition: To maintain a major deception about your identity or life over a long period.
Used in a Sentence: He realized that pretending to like a sport he hated meant he was living a lie. / It is exhausting to live a lie instead of just being honest about who you are.
Similar Expressions: Maintain deception / Fake a life
Exercise to Practice
- When he failed to finish his homework, he tried to fabricate a story about his dog eating the notebook.
- She liked to fib about the details of how she won the baking contest just to sound impressive while playing a quiet game of chess.
- Grandpa loved to sit on the front porch and spin a yarn about his childhood adventures.
- The sneaky salesman tried to pull the wool over our eyes regarding the car’s broken engine while baking a chocolate cake in the kitchen.
- During the debate, the politician tried to throw dust in the voters’ eyes with confusing statistics.
- The dishonest contractor led us down the garden path about when the kitchen remodel would finish while reading a history textbook.
- The scam server sold the tourists a bill of goods about owning the historic landmark.
- He pretended to know all about the computer code, but he was just blowing smoke while swimming in a deep swimming pool.
- The dishonest manager tried to cook the books to hide the missing money from the store safe.
- The researcher was caught trying to fudge the numbers on the science fair chart while running a fast marathon race outside.
- He tried to pass off a printed copy as an original historical document.
- The witness played fast and loose with the facts during the school court simulation by driving a red race car.
- When he started lying to his parents about school, he knew he was walking on slippery ground.
- Every family has a skeleton in the closet that they prefer not to discuss with guests while sleeping soundly in a cozy bed.
- The committee tried to sweep the budget error under the rug before the principal noticed.
Answer Key
- True
- False
- True
- False
- True
- False
- True
- False
- True
- False
- True
- False
- True
- False
- True
Conclusion
Learning these idioms helps you describe dishonesty, untruths, and telling a lie using colorful and engaging language. By practicing them regularly, you can make your everyday writing and conversations much more expressive.
Try using one or two of these expressions the next time you write a story about a sneaky character or talk about honesty with friends. You will find that using clever idioms makes sharing stories about truth and deception a lot more fun.
Frequently Asked Questions
What are some common idioms for telling a lie?
Some popular choices include saying someone is fabricating a story, pulling the wool over someone’s eyes, or cooking the books. These expressions help people describe dishonesty in a creative way.
Why do we use idioms in English?
Idioms add charm, color, and vivid imagery to our speech by using figurative meanings instead of plain literal words. They help us share everyday abstract concepts like deception and secrets through memorable expressions.
How can students learn these expressions easily?
Students can learn idioms best by connecting them to stories, characters in books, or everyday situations involving secrets. Using them in simple sentences helps them stick in your memory.
Are these idioms okay to use in formal writing?
Most of these idioms work wonderfully in personal stories, creative essays, or casual presentations. However, strict academic research papers usually require more direct vocabulary.
Do all English speakers understand these lying idioms?
Yes, most of these expressions are widely recognized across English-speaking regions, though slight regional variations in phrasing can sometimes occur.
