cool it, to

cool it

To calm down or stop. This phrase can be used as an imperative exclamation or as a verb phrase in the middle of a sentence. Cool it! I want you two to stop fighting this instant! My muscles have been really sore, so I'm going to cool it with the weight lifting for a while.
See also: cool

cool it

1. Calm down, relax, as in John was beginning to seethe, but I told him to cool it. [Slang; c. 1950]
2. Stop what one is doing, especially stop talking or behaving conspicuously, as in We'd be wise to cool it until the scandal blows over. It is also used as an imperative, as in Cool it! We'll be in trouble if anyone hears you. [Slang; c. 1950]
See also: cool

ˈcool it

(informal) behave in a less aggressive or excited way; calm down: His friends were holding him back and telling him to cool it, but he broke free and punched the barman on the nose.
See also: cool

cool it

Slang
1. To calm down; relax.
2. To stop doing something.
See also: cool

cool it, to

To calm down. This slangy Americanism emerged about 1950 and caught on rapidly. It is thought to come from the usage of “cool” to mean calm and unflustered. In 1953 E. Gilbert wrote, “Cool it, girl. Nobody’s interested” (Hot and Cool). Related expressions from the same period are to keep one’s cool, meaning to remain calm, and the antonym to lose/blow one’s cool, for losing one’s composure.
See also: cool