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💬 Say what you mean

38 English Idioms Explained, with Examples

Common idioms from first grade to advanced, each with a plain meaning and an example sentence, plus a quick quiz.

Grades K–2

a piece of cake
Very easy.
“The spelling test was a piece of cake.”
raining cats and dogs
Raining very hard.
“Bring an umbrella; it’s raining cats and dogs.”
hold your horses
Wait a moment; be patient.
“Hold your horses! We leave in five minutes.”
under the weather
Feeling a little sick.
“Ava stayed home because she was under the weather.”

Grades 3–5

let the cat out of the bag
Tell a secret by accident.
“Leo let the cat out of the bag about the surprise party.”
break the ice
Help people relax and start talking.
“Our teacher told a joke to break the ice on the first day.”
hit the books
Study hard.
“I need to hit the books before the science test.”
once in a blue moon
Very rarely.
“We eat at that restaurant once in a blue moon.”
cost an arm and a leg
Be very expensive.
“That new bike costs an arm and a leg.”
in hot water
In trouble.
“Sam was in hot water for forgetting his homework again.”
spill the beans
Reveal a secret.
“Don’t spill the beans about the ending!”
on cloud nine
Extremely happy.
“Maya was on cloud nine after winning the art prize.”
a blessing in disguise
Something that seems bad at first but turns out good.
“Missing the bus was a blessing in disguise; I found my lost book on the walk.”

Grades 6–8

the ball is in your court
It is your turn to decide or act.
“I’ve said sorry. Now the ball is in your court.”
bite off more than you can chew
Take on more than you can manage.
“Joining four clubs was biting off more than I could chew.”
cut corners
Do something badly to save time or money.
“If you cut corners on the project, it will fall apart.”
get cold feet
Become nervous and want to back out.
“He got cold feet right before the speech.”
hit the nail on the head
Describe exactly what is causing a situation.
“You hit the nail on the head: we need more practice time.”
on the fence
Undecided.
“I’m still on the fence about which book to read next.”
the last straw
The final problem that makes you lose patience.
“When the printer jammed again, it was the last straw.”
see eye to eye
Agree.
“My brother and I don’t always see eye to eye.”
steal someone’s thunder
Take attention or credit from someone else.
“She stole my thunder by announcing the news first.”
beat around the bush
Avoid saying something directly.
“Stop beating around the bush and tell me what happened.”
burn the midnight oil
Work or study late into the night.
“She burned the midnight oil to finish her essay.”
a dime a dozen
Very common and not special.
“Phone chargers are a dime a dozen these days.”

Grades 9–12

add insult to injury
Make a bad situation worse.
“To add insult to injury, it started to rain after we lost.”
a double-edged sword
Something with both good and bad effects.
“Fame can be a double-edged sword.”
the elephant in the room
An obvious problem that no one mentions.
“The budget cut was the elephant in the room at the meeting.”
a wolf in sheep’s clothing
Someone who hides bad intentions behind a friendly appearance.
“The charming salesman turned out to be a wolf in sheep’s clothing.”
by the skin of your teeth
Only just; very narrowly.
“We caught the train by the skin of our teeth.”
throw caution to the wind
Take a risk without worrying.
“For once, she threw caution to the wind and auditioned.”
the tip of the iceberg
A small, visible part of a much larger problem.
“The leaky tap was just the tip of the iceberg.”

Advanced

a Pyrrhic victory
A win that costs so much it is almost a defeat.
“Winning the argument but losing the friendship was a Pyrrhic victory.”
Achilles’ heel
A weakness in someone otherwise strong.
“Time management is his Achilles’ heel.”
cross the Rubicon
Pass a point of no return.
“By signing the lease, they had crossed the Rubicon.”
a Herculean task
A job that needs enormous effort.
“Cleaning out the attic was a Herculean task.”
to have a chip on your shoulder
To hold a grudge or feel resentful.
“He has had a chip on his shoulder since he lost the election.”
to read between the lines
To understand a hidden meaning.
“Reading between the lines, the email was a polite no.”

💬 Idioms quiz

Eight idioms. Pick the meaning.

1. What does “a piece of cake” mean?
2. What does “let the cat out of the bag” mean?
3. What does “hit the books” mean?
4. What does “in hot water” mean?
5. What does “bite off more than you can chew” mean?
6. What does “hit the nail on the head” mean?
7. What does “a double-edged sword” mean?
8. What does “a wolf in sheep’s clothing” mean?

More word fun

Frequently asked questions

What is an idiom?

An idiom is a phrase whose meaning is different from the meanings of its words. “It’s raining cats and dogs” has nothing to do with pets; it means it is raining hard.

Why are idioms hard to learn?

You can’t work them out word by word, and many come from old customs or stories. Reading widely, and noticing idioms in context, is the best way to learn them.

Where do idioms like “Achilles’ heel” come from?

Some come from myths and history. In Greek legend, the hero Achilles could only be wounded in his heel, so an Achilles’ heel is a weak spot.

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