Here is a list of common idioms and their meanings:

 

• A piece of cake: Something that is very easy to do.
• Break the ice: To start a conversation in an awkward or tense situation.
• Bite the bullet: To face a difficult or unpleasant situation with courage.
• Costs an arm and a leg:Something is very expensive.
• Hit the books: To study hard.
• Kill two birds with one stone: To accomplish two things with a single action.
• Let the cat out of the bag: To accidentally reveal a secret.
• Once in a blue moon: Something that happens very rarely.
• Piece of cake: Something very easy to do.
• Spill the beans: To reveal a secret.
• Under the weather: Feeling sick or unwell.
• The ball is in your court: It's your turn to take action or make a decision.
• Burn the midnight oil: To work late into the night.
• Hit the nail on the head: To describe exactly what is causing a problem.
• To not see the wood for the trees: To be so involved with the details that you don't get the most important facts.