1. Cool Your Jets Now

: 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

The phrase emerged in the during the mid-20th century, a period deeply influenced by rapid developments in aviation and the "Space Age". 1. Cool Your Jets

: 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."). : To tell someone to wait when they are rushing a process (e

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