EF - 20 idioms everyone should know

1. Under the weather
2. The ball is in your court
3. Spill the beans
4. Break a leg
5. Pull someone’s leg
6. Sat on the fence (or more generally "on the fence")
7. Through thick and thin
8. Once in a blue moon
9. It’s the best thing since sliced bread
10. Take it with a pinch of salt
11. Come rain or shine
12. Go down in flames
13. You can say that again 
14. See eye to eye
15. Jump on the bandwagon
16. As right as rain
17. Beat around the bush
18. Hit the sack 
19. Miss the boat
20. By the skin of your teeth 

Click the title to see the article and find out what they mean :) 

Extra from me: Take a raincheck ;) I'll let you search this one.