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Vocabulary Level B1

30 Common English Idioms (and What They Mean)

30 common English idioms grouped by theme, with plain meanings and examples — how to use them naturally and the mistakes to avoid.

don't add up the words  ·  learn the whole phrase

An idiom is a phrase whose meaning you usually can't fully work out from the individual words — a piece of cake means "very easy", not dessert. They're everywhere in real conversation, so knowing the common ones helps you understand everyday English and sound more natural yourself. Learn each one as a whole phrase, ideally inside a sentence.

Everyday life

a piece of cake — very easy · once in a blue moon — very rarely · hit the sack — go to bed · under the weather — feeling sick · on the same page — in agreement · break the ice — start a conversation
Example: The test was a piece of cake.

Work & effort

pull your weight — do your fair share · get the ball rolling — start something · think outside the box — think creatively · back to the drawing board — start over · learn the ropes — learn how it's done · cut corners — skip steps to save time or money
Example: Let's get the ball rolling.

Feelings & opinions

over the moon — very happy · mixed feelings — both positive and negative feelings · get cold feet — become nervous about something you planned · a blessing in disguise — a hidden good thing · the last straw — the final problem that makes you lose patience · cost an arm and a leg — very expensive
Example: The delay turned out to be a blessing in disguise.

Talking & advice

spill the beans — reveal a secret · beat around the bush — avoid saying the main point · long story short — to summarize · call it a day — stop for now · it's not rocket science — it's not difficult · play it by ear — decide as you go
Example: Long story short, we missed the train.

Plans & decisions

on the fence — undecided · up in the air — uncertain / not decided · make up your mind — decide · at the last minute — very late, just before something happens · play it safe — avoid risk · by the book — following the rules
Example: I'm still on the fence about it.

Common mistakes

Changing a word. Many idioms are fixed expressions — changing a key word can make them sound wrong. But grammar words may change: pull your weight / pull my weight; spill the beans / spilled the beans.

✕a piece of pie · break the ice cube
✓a piece of cake · break the ice

Translating an idiom from your language. Idioms often don't translate word for word. If you don't know the English idiom, say the meaning plainly.

Overusing them. One well-placed idiom sounds natural; five in a row sounds like a textbook. Use them sparingly.

Quick exercise

Match the idiom to the meaning.

  1. The exam was a piece of cake. → ?
  2. I'm feeling a bit under the weather. → ?
  3. That car cost an arm and a leg. → ?
  4. Let's not beat around the bush. → ?
  5. She was over the moon about the news. → ?
Answer key
  1. very easy
  2. feeling sick
  3. very expensive
  4. get to the point / not avoid it
  5. very happy

Related topics

30 Essential Phrasal Verbs for Beginners Common English Collocations False Friends: English Words That Trick You

Practice this in Recursio

Idioms stick best when you meet them in context and review them — most of them don't add up from the words alone. Save the ones you like to your word list in Recursio, and spaced recall brings "piece of cake" and "under the weather" back until you can drop them naturally.

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