Idioms are special figurative expressions where the combined words create a meaning completely different from their literal definitions. People use them in everyday speech to describe characters, behavior, and personality traits in a colorful way. In this article, you will learn fifty unique idioms related to describing an evil or wicked person.
In this lesson, we’ll look at idioms that mean cruelty, dishonesty, and bad intentions. Let’s get started and explore some of these helpful expressions.
Idioms for an Evil Person
1. Bad egg
Definition: A dishonest, wicked, or unreliable person whom you should avoid.
Used in a Sentence: The detective knew that suspect was a bad egg from their very first meeting. / Stay away from that bad egg if you want to stay out of trouble.
Similar Expressions: Dishonest person / Troublemaker
2. Black sheep
Definition: A person who is considered bad, rebellious, or disgraced compared to others in a family or group.
Used in a Sentence: In the story, the wicked villain acted like the black sheep of the royal family. / He felt like the black sheep because he constantly caused trouble for everyone.
Similar Expressions: Rebellious outcast / Disgraced member
3. Cold-blooded
Definition: Showing no emotional warmth, sympathy, or mercy toward others.
Used in a Sentence: The villain in the adventure book made a cold-blooded plan to trick the villagers. / Leaving the puppy out in the rain was a cold-blooded thing to do.
Similar Expressions: Heartless / Cruel
4. Crocodile tears
Definition: Insincere, fake tears shown by someone who does not actually care about your pain.
Used in a Sentence: He cried crocodile tears when he got caught breaking the rule, but he didn’t mean it. / Do not believe her crocodile tears because she caused the mess on purpose.
Similar Expressions: Fake crying / Insincere sorrow
5. Cutthroat
Definition: A person who is fiercely ruthless, cruel, and willing to hurt others to win.
Used in a Sentence: The game of trading cards can sometimes turn into a cutthroat competition among players. / He acted like a cutthroat businessman when he traded away my rare cards.
Similar Expressions: Ruthless person / Cruel competitor
6. Dark soul
Definition: A poetic way to describe someone whose inner character is full of malice and wickedness.
Used in a Sentence: The mysterious antagonist in the fantasy novel was known as a dark soul. / Legends warned people to stay away from the dark soul living in the old tower.
Similar Expressions: Wicked person / Malicious individual
7. Devil incarnate
Definition: A person who acts with such extreme wickedness that they seem like the devil himself.
Used in a Sentence: In the historical tale, the cruel ruler was described by citizens as the devil incarnate. / Do not let his charming smile fool you into thinking he isn’t the devil incarnate.
Similar Expressions: Pure evil / Wicked fiend
8. Double-dealing
Definition: Practicing treacherous deception and tricking people behind their backs.
Used in a Sentence: We caught him in an act of double-dealing when he shared our secret plan with the rival team. / Trust vanished once everyone discovered her sneaky double-dealing ways.
Similar Expressions: Treachery / Two-faced behavior
9. Hard-hearted
Definition: Completely lacking kindness, sympathy, or compassion for anyone in need.
Used in a Sentence: Only a hard-hearted person would ignore a stray kitten shivering in the cold. / The wicked queen was famously hard-hearted toward her subjects.
Similar Expressions: Unsympathetic / Uncaring
10. Heart of stone
Definition: Having an emotional core that is completely unfeeling, cruel, and hard.
Used in a Sentence: The villain listened to the pleas for help with a heart of stone. / You must have a heart of stone if you can ruin someone’s hard work without feeling sorry.
Similar Expressions: Cruel nature / Unfeeling spirit
11. Jackal
Definition: A sly, untrustworthy person who preys on the weak or vulnerable.
Used in a Sentence: He acted like a jackal by taking credit for the younger student’s artwork. / Stay away from that jackal who only flatters you when he wants something.
Similar Expressions: Sneaky predator / Treacherous person
12. Judas
Definition: A person who betrays a friend or ally for personal gain.
Used in a Sentence: Sharing our secret playbook with the rival team made him a modern-day Judas. / True friends never act like a Judas when things get tough.
Similar Expressions: Traitor / Betrayer
13. Lowlife
Definition: A disreputable person who engages in wicked, dishonest, or criminal behavior.
Used in a Sentence: The comic book villain was portrayed as a dishonest lowlife trying to steal from the town. / Police searched for the lowlife who vandalized the community playground.
Similar Expressions: Criminal / Worthless person
14. Malicious gossip
Definition: A person who spreads mean, harmful lies to destroy someone’s reputation.
Used in a Sentence: She was known around school as a malicious gossip who loved starting hurtful rumors. / Do not listen to that malicious gossip because her stories are completely false.
Similar Expressions: Rumor spreader / Mean stirrer
15. Rotten to the core
Definition: Entirely wicked, dishonest, and corrupt through and through.
Used in a Sentence: The greedy pirate leader proved he was rotten to the core by tricking his own crew. / Lies and cheating show that his character is rotten to the core.
Similar Expressions: Completely corrupt / Deeply wicked
16. Serpent in your bosom
Definition: A traitorous, evil person whom you trusted and helped before they hurt you.
Used in a Sentence: Welcoming him into our study group turned out to be harboring a serpent in our bosom when he stole our notes. / The king realized too late that his trusted advisor was a serpent in his bosom.
Similar Expressions: Trarusted traitor / Backstabber
17. Shark
Definition: A ruthless, predatory person who cheats or takes advantage of unsuspecting people.
Used in a Sentence: Be careful trading cards with him because he acts like a card shark looking for victims. / The dishonest salesman was a real shark who tricked people into buying broken toys.
Similar Expressions: Predator / Deceptive swindler
18. Snake in the grass
Definition: A hidden, treacherous, and deceitful person who pretends to be a friend.
Used in a Sentence: He smiled to my face while spreading rumors, proving he was a total snake in the grass. / Watch out for that snake in the grass who betrays your trust behind your back.
Similar Expressions: Traitor / Deceitful friend
19. Spider spinning a web
Definition: A cunning, wicked person who carefully sets traps to ensnare others.
Used in a Sentence: The evil character sat in the dark like a spider spinning a web of lies. / She watched her classmates fall for her trick like a spider spinning a web.
Similar Expressions: Cunning schemer / Mastermind of deceit
20. Stained reputation
Definition: The ruined standing of someone known for wicked or dishonest actions.
Used in a Sentence: After cheating in the tournament, his stained reputation followed him all year. / A wicked person quickly earns a stained reputation in any community.
Similar Expressions: Ruined character / Tarnished name
21. Tiger by the tail
Definition: A dangerous, wicked situation or person that is terrifying to handle once engaged.
Used in a Sentence: Teaming up with that dishonest bully felt like holding a tiger by the tail. / He realized he had a tiger by the tail when the wicked trickster turned on him.
Similar Expressions: Dangerous entanglement / Risky foe
22. Toxic person
Definition: Someone whose malicious behavior constantly brings harm and misery to others.
Used in a Sentence: It is best to walk away from a toxic person who only brings negativity into your life. / Her mean words proved she was a toxic person who enjoyed upsetting classmates.
Similar Expressions: Harmful individual / Poisonous friend
23. Two-faced
Definition: Deceitful, dishonest, and acting friendly while plotting against someone.
Used in a Sentence: I cannot stand two-faced people who smile at you and say mean things behind your back. / His two-faced behavior was exposed when we read his text messages.
Similar Expressions: Deceitful / Backstabbing
24. Viper
Definition: A venomous, treacherous, and deeply malicious person.
Used in a Sentence: The wicked stepsister acted like a viper in the classic fairy tale. / Do not trust a word that viper says because he only tells lies.
Similar Expressions: Treacherous foe / Malicious person
25. Vulture
Definition: A greedy person who preys upon the misfortunes or weaknesses of others.
Used in a Sentence: He acted like a vulture by trying to buy my rare comic book for pennies when I lost my wallet. / Vultures circle around people who are struggling just to take advantage of them.
Similar Expressions: Opportunistic predator / Exploiter
26. Wicked witch
Definition: A classic storybook character known for casting evil spells and plotting harm.
Used in a Sentence: In the fairy tale, the wicked witch tried to trick the travelers in the forest. / Stop acting like a wicked witch just because things didn’t go your way today.
Similar Expressions: Evil sorceress / Mean villain
27. Wolf in sheep’s clothing
Definition: A dangerous, evil person who hides behind a friendly, harmless appearance.
Used in a Sentence: The smooth-talking stranger was a wolf in sheep’s clothing trying to steal our supplies. / Beware of the wolf in sheep’s clothing who pretends to help you while planning trouble.
Similar Expressions: Hidden threat / Deceitful impostor
28. Alley cat
Definition: A rough, untrustworthy, and disreputable person who sneaks around.
Used in a Sentence: The petty thief crept through the dark alleys like a stray alley cat. / Stay away from those alley cats who hang around looking for trouble.
Similar Expressions: Sneaky rogue / Street scoundrel
29. Bare-faced liar
Definition: Someone who tells wicked, obvious falsehoods without any shame.
Used in a Sentence: He was a bare-faced liar who denied eating the cookies even with crumbs on his face. / Do not believe a single word from that bare-faced liar.
Similar Expressions: Shameless deceiver / Habitual liar
30. Black-hearted
Definition: Having an utterly malicious, cruel, and unforgiving inner spirit.
Used in a Sentence: The black-hearted villain laughed as he ruined the village festival. / Only a black-hearted person could treat animals with such cruelty.
Similar Expressions: Cruel-spirited / Malicious
31. Bloodsucker
Definition: A cruel person who exploits or drains the resources of others selfishly.
Used in a Sentence: The dishonest landlord was labeled a bloodsucker by the struggling tenants. / Stop acting like a financial bloodsucker taking everyone’s lunch money.
Similar Expressions: Exploiter / Parasite
32. Brute
Definition: A savage, violent, and unfeeling person who uses force to harm others.
Used in a Sentence: The giant bully acted like a mindless brute on the playground. / Only a violent brute would destroy someone else’s hard work in anger.
Similar Expressions: Savage person / Bully
33. Con artist
Definition: A wicked, smooth-talking criminal who tricks people out of their belongings.
Used in a Sentence: The traveling con artist tricked the villagers into buying fake magic beans. / Never trust a slick con artist offering unbelievable deals.
Similar Expressions: Swindler / Fraudster
34. Corrupt soul
Definition: Someone whose morals and honesty have been entirely destroyed by evil choices.
Used in a Sentence: Greed turned his once-honest heart into a thoroughly corrupt soul. / Legends spoke of a corrupt soul who traded his integrity for stolen gold.
Similar Expressions: Ruined spirit / Immoral person
35. Cruel taskmaster
Definition: A harsh, unyielding boss or leader who treats people with malice.
Used in a Sentence: The harsh coach acted like a cruel taskmaster during brutal practices. / Working under such a cruel taskmaster drained all the fun out of the club.
Similar Expressions: Harsh boss / Tyrant
36. Cutthroat villain
Definition: A murderous or extremely dangerous antagonist in a story or real life.
Used in a Sentence: The story featured a cutthroat villain who terrorized the coastal town. / Pirates in old tales were often led by a cutthroat villain.
Similar Expressions: Ruthless antagonist / Dangerous criminal
37. Deceitful ghost
Definition: A metaphor for a shadowy, dishonest person who vanishes after causing harm.
Used in a Sentence: After stealing the equipment, the deceitful ghost disappeared into the night. / He was a deceitful ghost who never faced the consequences of his pranks.
Similar Expressions: Sneaky phantom / Elusive trickster
38. Demonic presence
Definition: An overwhelming feeling that someone carries dark, evil energy.
Used in a Sentence: Stepping into the abandoned haunted house felt like entering a demonic presence. / The wicked ruler cast a demonic presence over the courtroom.
Similar Expressions: Evil aura / Dark spirit
39. Dirty dog
Definition: An old-fashioned slang term for a sneaky, dishonest, and untrustworthy person.
Used in a Sentence: The dirty dog stole my baseball glove and hid it in the bushes. / Who was the dirty dog that ruined our science project notes?
Similar Expressions: Sneaky scoundrel / Traitor
40. Fiend
Definition: A wicked, cruel, and monstrously evil individual.
Used in a Sentence: The comic book hero fought every fiend who tried to endanger the city. / Stop acting like a little fiend and share your toys nicely.
Similar Expressions: Monster / Wicked creature
41. Fox in the henhouse
Definition: A dangerous, cunning enemy placed right where they can cause maximum harm.
Used in a Sentence: Putting him in charge of the treasury was like letting a fox in the henhouse. / The clever thief was like a fox in the henhouse among our storage boxes.
Similar Expressions: Threat inside / Cunning intruder
42. Grim reaper of joy
Definition: A gloomy, malicious person who purposefully ruins everyone else’s happiness.
Used in a Sentence: Whenever he entered the room, he acted like the grim reaper of joy with his complaints. / Don’t be a grim reaper of joy during our celebration.
Similar Expressions: Killjoy / Gloomy spoiler
43. Grinning executioner
Definition: Someone who does cruel things while smiling pleasantly to your face.
Used in a Sentence: The cruel manager fired workers while smiling like a grinning executioner. / Watch out for his friendly grin because he acts like a grinning executioner.
Similar Expressions: Smiling villain / Cruel hypocrite
44. Hardened criminal
Definition: A wicked lawbreaker who feels no remorse for their harmful actions.
Used in a Sentence: The detective tracked the hardened criminal across three different states. / Years of dishonest choices turned him into a hardened criminal.
Similar Expressions: Habitual offender / Ruthless lawbreaker
45. Hateful troll
Definition: Someone who spreads cruel, malicious comments online just to cause misery.
Used in a Sentence: An anonymous hateful troll left mean messages on our club video page. / Ignore the hateful troll and focus on positive feedback from real friends.
Similar Expressions: Online bully / Mean commenter
46. Machiavellian schemer
Definition: A brilliantly cunning and utterly ruthless person who plots evil manipulation.
Used in a Sentence: The political strategist was a Machiavellian schemer who manipulated everyone. / She plotted her class election win like a true Machiavellian schemer.
Similar Expressions: Cunning manipulator / Ruthless plotter
47. Merciless tyrant
Definition: A cruel ruler or leader who abuses power to oppress and terrify people.
Used in a Sentence: The kingdom suffered under the rule of a merciless tyrant for decades. / The strict captain acted like a merciless tyrant during the drill.
Similar Expressions: Cruel dictator / Oppressive leader
48. Poisonous tongue
Definition: A person whose words are consistently hateful, mean, and destructive.
Used in a Sentence: Beware of her poisonous tongue because she loves turning friends against each other. / His poisonous tongue caused arguments throughout the whole classroom.
Similar Expressions: Hateful speaker / Venomous words
49. Savage beast
Definition: A violent, cruel person who acts without civilized humanity.
Used in a Sentence: The villain in the jungle adventure acted like a savage beast. / Unleashing your anger on others turns you into a savage beast.
Similar Expressions: Violent person / Cruel monster
50. Wicked imp
Definition: A mischievous, malicious troublemaker who delights in causing chaos.
Used in a Sentence: My little brother hid my homework like a wicked imp and giggled. / The cartoon character was drawn as a tiny, wicked imp causing trouble.
Similar Expressions: Mischievous fiend / Malicious rascal
Exercise to Practice
- The detective knew that suspect was a bad egg from their very first meeting.
- The villain in the adventure book made a warm, loving, and merciful plan to help the villagers.
- We caught him in an act of double-dealing when he shared our secret plan with the rival team.
- Only a hard-hearted person would ignore a stray kitten shivering in the cold.
- He smiled to my face while spreading rumors, proving he was a total snake in the grass.
- The traveling con artist tricked the villagers into buying fake magic beans.
- Putting him in charge of the treasury was like letting a helpful puppy into a sunny park.
- The smooth-talking stranger was a wolf in sheep’s clothing trying to steal our supplies.
- Years of dishonest choices turned him into a gentle, law-abiding community helper.
- The kingdom suffered under the rule of a merciless tyrant for decades.
- He was a bare-faced liar who denied eating the cookies even with crumbs on his face.
- The comic book hero fought every fiend who tried to endanger the city.
- The story featured a kind, gentle hero who handed out flowers to everyone.
- An anonymous hateful troll left mean messages on our club video page.
- Greed turned his once-honest heart into a thoroughly corrupt soul.
Answer Key
- True
- False
- True
- True
- True
- True
- False
- True
- False
- True
- True
- True
- False
- True
- True
Conclusion
Learning these idioms helps you describe wicked characters, cruelty, and dishonest behavior using colorful and descriptive language. Try using a few of these expressions in your creative writing when building interesting antagonists for your stories.
Frequently Asked Questions
What are some common idioms for an evil person?
Common idioms for a wicked or cruel person include phrases like snake in the grass, wolf in sheep’s clothing, and rotten to the core. These expressions help describe dishonest and malicious behavior in literature and daily life.
Why do we use idioms to describe bad characters?
Idioms give us vivid, memorable ways to express complex personality traits like treachery and cruelty that plain words sometimes cannot capture. They make storytelling and character descriptions much more engaging.
How can I practice using these idioms?
You can practice by using these phrases when writing fictional stories or analyzing villains in your favorite books and movies. Matching them to descriptive character profiles is also very helpful.
Are these idioms suitable for kids?
Most of these idioms are standard literary terms used in fairy tales, novels, and school essays to describe antagonists. Context helps ensure they are used appropriately for storytelling.
Can idioms help me understand story villains better?
Yes, recognizing these expressions helps you understand character motivations, betrayals, and plot twists in books and movies much more clearly.
