blow one’s cool

blow (one's) cool

To lose control of one's composure, temper, or nerve. He really blew his cool when the waiter dropped his food. I really blew my cool during the interview.
See also: blow, cool
Farlex Dictionary of Idioms.

blow one’s cool

tv. to become angry. I almost blew my cool when the dog wet my pants leg.
See also: blow, cool
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • blow (one's) cool
  • blow cool
  • blow one's cool
  • blow your cool
  • blow/knock somebody's socks off
  • blow (one's) socks off
  • blow someone’s mind
  • blow someone's mind
  • blow mind
  • blow (one's) mind