cool it, to
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.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
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]
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.
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.
Farlex Partner Idioms Dictionary © Farlex 2017
1. To calm down; relax.
2. To stop doing something.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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.
The Dictionary of Clichés by Christine Ammer Copyright © 2013 by Christine Ammer