25 Common English Idioms Every Student Should Know (With Meanings)


Learning English isn’t just about grammar rules and vocabulary lists. If you truly want to understand the language, especially the way native speakers use it, idioms are essential. These expressions can be confusing at first because their meanings aren’t always obvious. But once you get familiar with them, they’ll make your English sound more natural and fluent.

This post explores 25 common English idioms every student should know. We’ll cover what they mean and how to use them. By the end of this article, you’ll be well on your way to sounding like a native speaker.


Why Idioms Matter in English

Idioms are phrases or expressions with figurative meanings that differ from the literal interpretation of the words. For example, if someone says “it’s raining cats and dogs,” they don’t literally mean animals are falling from the sky—they just mean it’s raining heavily.

English idioms appear in movies, books, songs, everyday conversations, and even academic settings. Learning them will improve your listening comprehension, enrich your writing, and make you a more confident speaker.


25 Must-Know English Idioms for Students

Let’s dive into the idioms, complete with meanings and simple examples.


Break the ice
To make people feel more comfortable.
She told a joke to break the ice.
Hit the books
To study seriously.
I need to hit the books tonight.
A piece of cake
Something very easy to do.
That math test was a piece of cake!
Under the weather
Feeling ill or unwell.
I stayed home from class because I was under the weather.
Burn the midnight oil
To stay up late working or studying.
She burned the midnight oil to finish her project.
Let the cat out of the bag
To reveal a secret unintentionally.
He let the cat out of the bag about the surprise party.
Hit the nail on the head
To describe something exactly right.
Your answer hit the nail on the head!
Cost an arm and a leg
Very expensive.
That phone cost an arm and a leg.
In hot water
In trouble.
He was in hot water for missing the deadline.
The ball is in your court
It’s your turn to take action.
Now the ball is in your court.
Bite the bullet
To do something unpleasant but necessary.
I had to bite the bullet and take the test.
Once in a blue moon
Something that happens very rarely.
We go on vacation once in a blue moon.
Add fuel to the fire
To make a bad situation worse.
His comments added fuel to the fire.
Cry over spilled milk
To be upset over something that can't be changed.
Don’t cry over spilled milk.
Jump on the bandwagon
To join others in doing something popular.
She jumped on the bandwagon and bought the latest phone.
Pull someone’s leg
To joke or tease someone.
Are you pulling my leg?
Hit the sack
To go to bed or sleep.
I'm tired—time to hit the sack.
Sit on the fence
To remain neutral.
He sat on the fence during the argument.
Spill the beans
To reveal a secret.
She spilled the beans about the party.
Keep your chin up
Stay positive.
Keep your chin up—you’ll do better next time.
Get cold feet
To suddenly become nervous.
She got cold feet before the speech.
Through thick and thin
In good times and bad.
They stayed together through thick and thin.
Bend over backwards
To make a great effort.
The teacher bent over backwards to help.
A blessing in disguise
Something that seems bad but turns out good.
Losing that job was a blessing in disguise.
Get the hang of something
To learn how to do something.
I finally got the hang of it.


How to Practice and Remember Idioms

Learning idioms is one thing—remembering and using them correctly is another. Here are some practical tips to help:

1. Use flashcards

Create digital or paper flashcards with the idiom on one side and its meaning and an example on the other. Quiz yourself regularly.

2. Watch English media

TV shows, movies, and YouTube videos often use idioms. Listen closely and try to identify the expressions.

3. Write them in sentences

Instead of memorizing idioms in isolation, write your own sentences. Personalizing them makes them easier to remember.

4. Practice speaking

Use new idioms in conversations with classmates, teachers, or language exchange partners. The more you use them, the more natural they’ll become.

5. Learn in context

Group idioms by theme—like school, health, emotions, etc.—so you can recall them when a specific topic arises.


Final Thoughts

Idioms are a powerful tool for students learning English. They enhance your understanding of the language, help you connect with native speakers, and make your communication more expressive. By mastering even a handful of common idioms, you’ll see a big improvement in both your fluency and confidence.

So, the next time you want to say something’s easy, don’t just say “It’s easy.” Say, “It’s a piece of cake!” That little change can make a big difference.

Which idioms from this list do you already use? Which ones will you try today? Let us know in the comments!

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