lose (one's) cool

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lose (one's) cool

To lose control of one's composure, temper, or nerve in a given situation. He really lost his cool when the waiter dropped his food. I really lost my cool during the interview.

See also: cool, lose

lose one's cool

 and blow one's cool

to lose one's temper; to lose one's nerve. Wow, he really lost his cool! What a tantrum! Whatever you do, don't blow your cool.

See also: cool, lose

lose one's cool

see under keep one's cool.

See also: cool, lose

lose your cool

COMMON If you lose your cool, you suddenly get angry and behave in a bad-tempered or uncontrolled way. At this point, I lost my cool and shouted `for goodness sake, stop!' `Why don't you sit down and have a drink?' — `I don't want a drink,' Anne replied, losing her cool.

See also: cool, lose

lose your cool

lose control of your temper or emotions. informal

See also: cool, lose

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