blow (one's) cool

To lose control of one's composure, temper, or nerve in a given situation. He really blew his cool when the waiter dropped his food. I really blew my cool during the interview.

Common Names:

Name	Pronounced	Usage
Angelika	ahn-GE-lee-kah (German), ahn-ge-LEE-kah (Polish)	German, Polish, Slovak, Czech
Stacee	STAY-see	English (Rare)
Tadala	tah-DAH-lah	Southern African, Chewa
GobÁN	-	Irish
Ruprecht	-	German (Archaic)
Yates	[jeits]