lose (your) cool

to suddenly become very angry and start shouting.

I try to be patient with her but she made so many irritating comments, I absolutely lost my cool.

Opposite of: keep (your) cool

• dead hand of
• dead hand of something
• dead in the water
• dead letter
• Dead men tell no tales.
• dead of winter
• dead on arrival
• dead ringer for
• dead ringer for someone
• dead ringer for something
• dead set against
• dead set against something
• dead to the world
• dead weight
• dead wood
• deal a death blow
• deal something a death blow
• Dear John letter
• dear to heart
• dear to someone's heart
• death blow
• death knell
• death trap
• deck out
• deck out someone