"" is an informal American idiom used to tell someone to calm down , slow down, or stop being so impatient or angry. It suggests that a person should lower their emotional intensity, much like allowing a powerful jet engine to cool off before pushing it again. Origin and History
: Specifically used when someone's anger is "boiling over". Keep your shirt on : An older idiom for staying calm. Pop Culture Connections 1. Cool Your Jets
or Take a chill pill : Modern, very informal ways to say the same thing. "" is an informal American idiom used to