What are the 10 most common idioms?

Idioms are the spice of language, adding color, nuance, and sometimes a dash of confusion to our conversations.1 These phrases, where the meaning isn't obvious from the individual words, are deeply embedded in everyday English.2 Understanding them isn't just about sounding more like a native speaker; it's about truly grasping the subtle messages being conveyed.

While there are countless idioms, some pop up far more frequently than others. Here are 10 of the most common idioms you'll encounter, along with their meanings and examples, to help you navigate the linguistic landscape with greater ease.

1. A Piece of Cake

When something is a piece of cake, it means it's incredibly easy to do.

• Example: "That math problem was a piece of cake after all the studying I did."

2. Under the Weather

If someone is under the weather, they're feeling a bit unwell or slightly sick.

• Example: "I'm feeling a bit under the weather today, so I think I'll skip the gym."

3. Break a Leg

This is a classic way to wish someone good luck, especially before a performance or a big event.

• Example: "You've got a big presentation tomorrow – break a leg!"

4. Cost an Arm and a Leg

Something that costs an arm and a leg is extremely expensive.

• Example: "The repairs for my car are going to cost an arm and a leg."

5. Let the Cat Out of the Bag

To let the cat out of the bag means to accidentally reveal a secret.

• Example: "I didn't mean to let the cat out of the bag about the surprise party, but I got too excited."

6. Hit the Nail on the Head

When you hit the nail on the head, you've described a situation or problem exactly, or said something perfectly correct.

• Example: "You really hit the nail on the head when you said our team needs better communication."

7. Once in a Blue Moon

This idiom signifies something that happens very rarely.

• Example: "My brother lives abroad, so I only see him once in a blue moon."

8. The Ball is in Your Court

If the ball is in your court, it means it's your turn to take action or make a decision.

• Example: "I've given you all the information you need; now the ball is in your court."

9. Kill Two Birds with One Stone

To kill two birds with one stone means to achieve two different things at the same time with a single action.3

• Example: "By carpooling, we kill two birds with one stone: we save gas and reduce traffic."

10. Cry Over Spilled Milk

This idiom advises against being upset or worrying about something bad that has already happened and cannot be changed.

• Example: "There's no point crying over spilled milk; we just need to find a new solution."

Idioms are an integral part of what makes English so vibrant and expressive. By incorporating these common phrases into your vocabulary, you'll not only enhance your understanding of native speakers but also add a richer, more natural flow to your own communication. So, next time you hear one of these, you won't be left scratching your head.