1. A piece of cake: Something very easy.
2. Beat around the bush: To avoid talking about something directly.
3. Break a leg: Good luck.
4. Call it a day: To stop doing something for the day.
5. Catch some z's: To go to sleep.
6. Cost an arm and a leg: To be very expensive.
7. Cry over spilt milk:** To be upset about something that cannot be changed.
8. Cut to the chase: To get to the main point.
9. Dressed to the nines: To be dressed very formally or elegantly.
10. Feeling under the weather: To feel sick or unwell.
11. Get a taste of your medicine: To experience the same thing that you have done to someone else.
12. Hit the nail on the head: To say exactly what is true or correct.
13. Hold your horses: To wait or slow down.
14. In a nutshell: In short or in summary.
15. It's a small world: Coincidentally encountering someone you know in an unexpected place or situation.
16. Keep your chin up: To stay positive or optimistic.
17. Let the cat out of the bag: To reveal a secret.
18. Make a mountain out of a molehill: To make a big deal out of something that is not important.
19. Once in a blue moon: Very rarely or seldom.
20. Pull the wool over someone's eyes: To deceive or mislead someone.