1. Cool Your Jets Access

: 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!".

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

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