chill out

chill out idiom
Calm down or relax, as in Don't let it bother you—just chill out, or Rex decided to come home and chill out for a while. [Slang; 1970s.] Also see cool it.

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.

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