Sometimes, people use funny or kind ways to say someone is not very smart. Instead of just saying “dumb,” they use comparisons called similes. A simile compares one thing to something else, using the words “like” or “as.” For example, someone might say, “He’s as sharp as a marble.” This doesn’t mean the person is really a marble. It means the person isn’t very quick to understand things.
These similes are not meant to hurt others. They are often used in jokes or silly stories. They help make language more colorful and fun. In this article, you will learn some of these funny similes. You will also see how to use them in real-life sentences. Let’s take a look at some common ways people use similes to describe someone who might not be thinking very clearly.
Similes for Dumb
1. As sharp as a marble
Meaning: Not smart or quick to think.
In a Sentence: He’s as sharp as a marble when it comes to math. / She answered like she was as sharp as a marble.
Other Ways to Say: Not very bright / Slow thinker
2. As smart as a sack of rocks
Meaning: Very silly or not thinking clearly.
In a Sentence: That idea was as smart as a sack of rocks. / He ran into the wall like a sack of rocks.
Other Ways to Say: Not clever / Lacking common sense
3. Like a screen door on a submarine
Meaning: Useless or makes no sense.
In a Sentence: Asking him to fix it was like using a screen door on a submarine. / That plan is like a screen door on a submarine.
Other Ways to Say: Pointless / Doesn’t work
4. As bright as a burnt-out lightbulb
Meaning: Not thinking well or confused.
In a Sentence: She looked as bright as a burnt-out lightbulb when asked the question. / His idea was dim like a burnt-out bulb.
Other Ways to Say: Not very sharp / Dull thinker
5. Like a flashlight without batteries
Meaning: Missing something needed to think clearly.
In a Sentence: That answer was like a flashlight without batteries. / He works like a flashlight without batteries.
Other Ways to Say: Not ready / Not all there
6. As deep as a puddle
Meaning: Not much thought or wisdom.
In a Sentence: His answer was as deep as a puddle. / Her thinking was puddle-deep.
Other Ways to Say: Shallow thinking / Simple-minded
7. Like trying to find logic in a rock
Meaning: The person or idea is very silly.
In a Sentence: Talking to him was like trying to find logic in a rock. / That story made as much sense as a rock.
Other Ways to Say: Doesn’t make sense / No smart thinking
8. As clueless as a goldfish
Meaning: Always confused or unaware.
In a Sentence: He looked as clueless as a goldfish in a library. / She stared like a goldfish at the board.
Other Ways to Say: Confused / Not aware
9. Like a broken pencil
Meaning: Useless or unhelpful in the moment.
In a Sentence: That idea is like a broken pencil pointless. / His joke was like a broken pencil.
Other Ways to Say: Not helpful / No point
10. As smart as toast
Meaning: Not thinking clearly or at all.
In a Sentence: She was acting as smart as toast today. / He stared like a piece of toast.
Other Ways to Say: Not thinking / Zoned out
11. Like a book with blank pages
Meaning: Not knowing anything.
In a Sentence: When asked the question, he was like a book with blank pages. / Her mind went blank like an empty book.
Other Ways to Say: Didn’t know / No answer
12. As empty as a drum
Meaning: Not much going on in the head.
In a Sentence: His answer was as empty as a drum. / She sounded empty like a drum.
Other Ways to Say: No idea / Nothing there
13. Like a car without gas
Meaning: Can’t go anywhere with their thinking.
In a Sentence: His thinking was like a car without gas. / Her plan ran out of ideas like an empty tank.
Other Ways to Say: No power / Can’t think ahead
14. As quick as a sloth
Meaning: Very slow to think or understand.
In a Sentence: He was as quick as a sloth on the test. / Her thinking moved like a sleepy sloth.
Other Ways to Say: Slow brain / Not fast
15. Like a phone with no signal
Meaning: Nothing is getting through.
In a Sentence: Explaining that to him was like calling a phone with no signal. / Her brain felt like a phone with no bars.
Other Ways to Say: Not listening / Not connected
16. As lost as a goose in a snowstorm
Meaning: Very confused.
In a Sentence: He looked as lost as a goose in a snowstorm during math class. / She was lost like a bird in a blizzard.
Other Ways to Say: Very puzzled / Doesn’t know where to go
17. Like a TV with no picture
Meaning: Missing the full picture or idea.
In a Sentence: His answer was like a TV with no picture. / She couldn’t see the full idea, just like a broken screen.
Other Ways to Say: Missing details / Not clear
18. As sharp as a bowling ball
Meaning: Not smart or quick.
In a Sentence: He’s as sharp as a bowling ball in science. / Her brain rolled along like a bowling ball.
Other Ways to Say: Dull / Not bright
19. Like a chicken solving a puzzle
Meaning: Way out of place or unable to solve anything.
In a Sentence: He was like a chicken solving a puzzle in math class. / She looked puzzled like a chicken with a Rubik’s cube.
Other Ways to Say: Can’t figure it out / Doesn’t get it
20. As alert as a rock
Meaning: Not paying attention at all.
In a Sentence: He was as alert as a rock in class today. / She sat there like a stone.
Other Ways to Say: Not paying attention / Zoned out
21. Like a sandwich without bread
Meaning: Missing something important.
In a Sentence: His plan was like a sandwich without bread just didn’t work. / That answer was missing parts, like a sandwich without bread.
Other Ways to Say: Incomplete / Doesn’t make sense
22. As wise as a doorknob
Meaning: Not wise at all.
In a Sentence: He gave advice that was as wise as a doorknob. / Her thinking was like talking to a doorknob.
Other Ways to Say: Not helpful / Bad advice
23. Like trying to teach a rock
Meaning: Impossible to explain things to.
In a Sentence: Talking to him about math was like trying to teach a rock. / She just didn’t get it like a rock in class.
Other Ways to Say: Not understanding / Can’t learn
24. As blank as a new chalkboard
Meaning: Nothing in their head at the moment.
In a Sentence: His face was as blank as a new chalkboard during the quiz. / Her mind was like a clean board empty.
Other Ways to Say: No idea / Didn’t know
25. Like a tree stump in a classroom
Meaning: Doesn’t move or respond.
In a Sentence: He sat there like a tree stump in a classroom. / Asking her questions was like talking to a stump.
Other Ways to Say: Doesn’t speak / Doesn’t react
26. As helpful as a chocolate teapot
Meaning: Totally useless.
In a Sentence: That idea was as helpful as a chocolate teapot. / Her answer melted under pressure like a chocolate teapot.
Other Ways to Say: Not useful / Doesn’t work
27. Like a balloon without air
Meaning: Lacking energy or ideas.
In a Sentence: His brain was like a balloon without air flat. / She couldn’t think of anything, like a flat balloon.
Other Ways to Say: No energy / No ideas
28. As focused as a squirrel in a candy store
Meaning: Can’t pay attention.
In a Sentence: He was as focused as a squirrel in a candy store. / She jumped from thought to thought like a distracted squirrel.
Other Ways to Say: Easily distracted / No focus
29. Like a fish in the desert
Meaning: Totally out of place or not getting it.
In a Sentence: He looked like a fish in the desert when asked to explain it. / She was confused like a fish out of water.
Other Ways to Say: Lost / Doesn’t belong
30. As clever as a broken clock
Meaning: Rarely right or helpful.
In a Sentence: His idea was as clever as a broken clock. / She had answers that were only right twice a day, like a broken clock.
Other Ways to Say: Not often correct / Rarely helpful
31. Like a sponge that doesn’t soak
Meaning: Doesn’t learn or take in anything.
In a Sentence: He was like a sponge that doesn’t soak up anything in class. / She heard the lesson but didn’t take it in.
Other Ways to Say: Doesn’t learn / Can’t remember
32. As useful as a paper umbrella in a storm
Meaning: Completely useless in the situation.
In a Sentence: That idea was as useful as a paper umbrella in a storm. / Her plan couldn’t hold up just like a paper umbrella.
Other Ways to Say: Not strong / Can’t work
33. Like trying to email a toaster
Meaning: The person or idea doesn’t belong in that space.
In a Sentence: Explaining science to him was like trying to email a toaster. / She was confused, like a toaster at a computer camp.
Other Ways to Say: Wrong place / Doesn’t get it
Exercise to practice
- During the science quiz, Lucas looked as ________ when he read the first question.
- Asking Mark to help with the puzzle was like trying to ________.
- Jenna’s idea was ________ it didn’t make sense at all.
- During math class, Emily sat there ________, not writing anything down.
- He answered the question like a ________, giving no helpful thought.
- That plan was ________ no one knew what it was for.
- When I asked her for help, it was like ________ nothing came back.
- During group work, he acted as focused as a ________.
- Her brain was as empty as a ________ after we studied for an hour.
- That silly answer was as clever as a ________.
- He made a face like a ________ in a desert when the teacher asked him a question.
- Talking to her about the homework was like trying to ________.
Answer Key
- blank as a new chalkboard
- teach a rock
- like a sandwich without bread
- like a tree stump in a classroom
- as smart as toast
- like a screen door on a submarine
- calling a phone with no signal
- squirrel in a candy store
- book with blank pages
- broken clock
- fish
- email a toaster
Conclusion
Similes help us say things in fun and creative ways. Instead of just saying someone is not thinking clearly, people use silly comparisons like “as sharp as a marble” or “like a broken pencil.” These phrases are often used in jokes or to describe funny moments.
Learning these similes helps us understand how people use words to share ideas in clever ways. Just remember, we should always be kind with our words and use similes to describe actions, not to hurt feelings.