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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.
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."
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
(I've) been keeping cool.and (I've been) keeping cool.
Inf. an answer to a question about what one has been doing during very hot weather. Jane: How do you like this hot weather? Bill: I've been keeping cool. Mary: Been keeping cool? Bob: Yeah. Been keeping cool.
(Have you) been keeping cool?and (Have you been) keeping cool?; You been keeping cool?
Inf. an inquiry about how someone is surviving very hot weather. Tom: What do you think of this hot weather? Been keeping cool? Sue: No, I like this weather just as it is. Mary: Keeping cool? Bill: Yup. Run the air-conditioning all the time.
Inf. to stay calm and undisturbed. Relax, man, keep cool! If Sally could just keep cool before a race, she could probably win.
keep one's cool
Inf. to remain calm and in control. Relax, man! Just keep your cool. It's hard to keep your cool when you've been cheated.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
Also, keep a cool head; stay cool; be cool; (take it cool). Remain calm and under control, as in Keep cool, they'll soon show up, or Be cool, the surprise is not spoiled, or You have to keep a cool head in these volatile situations, or Sit tight, take it cool, they won't bother you again. All these terms employ cool in the sense of "not heated by strong emotion," a usage dating from the late 1300s or even earlier. The first three expressions are colloquial and date from the second half of the 1800s; both of the last two are slang, and the very last (take it cool) is the oldest, first recorded in 1841. Also see keep one's cool; play it cool.
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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.
Collins COBUILD Idioms Dictionary, 3rd ed. © HarperCollins Publishers 2012
in. to keep calm. Now, keep cool. It’s going to be all right.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.