Cool your jets

Meaning

This is a command to slow down, calm down, or stop acting in a rush or an angry manner. It is a directive to regain your composure.

Sassy, patronizing

Used in a sentence

• Cool your jets, we still have twenty minutes before we need to leave.
• You need to cool your jets and let the boss speak before you interrupt him.
• Just cool your jets for a second, I am trying to get the map sorted.