1. Cool Your Jets -

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

: 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

: 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 1. Cool Your Jets

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

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

The expression is versatile and typically used in three scenarios:

If "cool your jets" feels too informal or dated, you might use: When to Use It : To tell someone

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