Meaning of “cool it” in the English Dictionary

british dictionary

"cool it" in British English

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cool it

slang

used to tell someone to become calm, rather than be angry or violent:

Just cool it everyone, fighting won't solve anything.

(Definition of “cool it” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"cool it" in American English

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cool it

slang to become calmer:

The two of you need to cool it, or I'll call the cops.
Note: Used to tell someone to do this.

(Definition of “cool it” from the Cambridge Academic Content Dictionary © Cambridge University Press)