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
Urbano	oor-BAH-no	Italian, Spanish
Honey	['hʌni]
Eskandar	-	Persian
Ratan	-	Indian, Hindi, Marathi, Bengali
Bricius	-	Ancient Celtic (Latinized)
Julyan	JOOL-yan	English (Rare)