1. Cool Your Jets Review

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

: 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

: 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 : Specifically used when someone's anger is "boiling over"

: 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!". It's not worth fighting over

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

The phrase emerged in the during the mid-20th century, a period deeply influenced by rapid developments in aviation and the "Space Age".