Your Jets | 1. Cool

: To advise caution when someone is acting impulsively out of enthusiasm (e.g., "Cool your jets, Sarah. Make sure you have the job offer in writing first.").

If "cool your jets" feels too informal or dated, you might use: 1. Cool Your Jets

: A classic alternative for advising patience. : To advise caution when someone is acting

: To stop someone from getting overly worked up or angry (e.g., "Cool your jets! It's not worth fighting over."). "Cool your jets

or Take a chill pill : Modern, very informal ways to say the same thing.