idiom

1. hit the ceiling : become enraged(暴怒)
2. hit the books : go to study
3. hit the sack : go to bed
4. twist someone's arms : do a great job of convincing someone to do something he might not have wanted to do
5. be up in the air : things are uncertain and unsure; definite plans have not been made yet
6. to stab someone in the back: hurt someone who is close to us and trusts us by betraying them secretly and breaking their trust; we call this person "back stabber"
7. lose your touch: use this when you are really good at a certain skill or talent, but then things start to go wrong.
8. sit tight: wait patiently and take no action until you hear otherwise
9. pitch in : contribute to something or to join in
10. go cold turkey: suddenly quit something  addictive-such as drugs or alcohol
11. face the music : face the reality  and accept all the consequences good or bad(usually bad)
12. on the ball: very quickly to understand certain things , very prepared for something or react quickly to a situation
13. ring the bell : someone has mentioned something familiar to you. "You've met Jack? I'm not sure, but that name rings a bell, Was she the one who went to Paris last year? "
14. Rule of thumb : it's a general unwritten rule for whatever you're talking about
15. under the weather : you're not your usual self and could be feeling a little sick
16. blow off steam : when you're feeling angry, stressed and  experiencing some strong feelings and you want to get rid of them so you get better again. you will blow off steam by doing something such as exercise to get rid of the stress
17. look like a million dollars/bucks : take it as huge compliment because it means you look absolutely fabulous and really attractive
18. cut the chase: when a person use this, they are telling you to hurry up and get the important part, without all the details.
19. Find you feet: you are still  adjusting and getting used to the new environment
20. keep chin up : when I feel depressed , my friend may say that to tell me to stay strong.
21.