or Take a chill pill : Modern, very informal ways to say the same thing.
: 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
: 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 or Take a chill pill : Modern, very
: Specifically used when someone's anger is "boiling over". Keep your shirt on : An older idiom for staying calm. Pop Culture Connections you might use:
If "cool your jets" feels too informal or dated, you might use: