1. Cool Your Jets May 2026

: 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.").

: To stop someone from getting overly worked up or angry (e.g., "Cool your jets! It's not worth fighting over."). 1. Cool Your Jets

The expression is versatile and typically used in three scenarios: : To advise caution when someone is acting

: To tell someone to wait when they are rushing a process (e.g., "Cool your jets—the results won't be ready for another hour."). Common Synonyms It's not worth fighting over

If "cool your jets" feels too informal or dated, you might use:

: One of its earliest recorded uses is in the 1952 novel Stand by for Mars! from the Tom Corbett, Space Cadet series, where a character is told, "Cool your jets, space creep!".

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