keep your cool

keep (one's) cool

To maintain control of one's composure, temper, or nerve in a given situation. He really kept his cool when the waiter dropped his food. I tried to keep my cool during the interview, but I was extremely nervous the whole time.
See also: cool, keep

keep cool

1. To stay calm and composed. You know they're going to try to antagonize you during the debate, so just keep cool. I always try to keep cool when dealing with the cable company.
2. Literally, to not get overly hot, as in hot weather. A: "How have you been during this brutal heat wave?" B: "Oh, keeping cool, thanks to the air conditioning in the office."
See also: cool, keep
Farlex Dictionary of Idioms.

keep your cool

COMMON If you keep your cool, you control your temper and stay calm in a difficult situation. Hilde's one of those born managers — keeps her cool in a crisis. I knew I had to keep my cool, but it was hard.
See also: cool, keep
Collins COBUILD Idioms Dictionary, 3rd ed.

keep/lose your ˈcool

(informal) stay calm/get angry, excited, etc: He was very insulting. I really don’t know how I managed to keep my cool.
See also: cool, keep, lose
Farlex Partner Idioms Dictionary
See also:
  • keep (one's) cool
  • keep cool
  • keep one’s cool
  • keep one's cool
  • keep/lose your cool
  • lose (one's) cool
  • lose cool
  • lose one’s cool
  • lose one's cool
  • lose your cool
References in periodicals archive
It may be difficult if she accuses you of things you didn't do, but keep your cool and let her know you'd really like a fresh start.
To enable you to keep your cool when all around are losing theirs, Newcastle Audi and Tyneside Audi have come up with a special summer offer.
MAKE SURE YOU KEEP YOUR COOL: Not sure if some of your e-mail messages could unknowingly ignite an argument or office impasse?
Auto-Affirmations is one tool to help you keep your cool in your car.