1. Cool Your Jets -

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

: 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."). 1. Cool Your Jets

: While it started in futuristic science fiction, it gained broader colloquial popularity by the 1970s as a metaphorical way to advise patience or emotional control. When to Use It If "cool your jets" feels too informal or

: Specifically used when someone's anger is "boiling over". Keep your shirt on : An older idiom for staying calm. Pop Culture Connections When to Use It : Specifically used when

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

: 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!".

: 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