I try to be patient with her but she made so many irritating comments, I absolutely lost my cool.
Opposite of: keep (your) cool
lose (one's) cool
To lose control of one's composure, temper, or nerve in a given situation. He really lost his cool when the waiter dropped his food.I really lost my cool during the interview.
lose one's cool
and blow one's cool
to lose one's temper; to lose one's nerve. Wow, he really lost his cool! What a tantrum!Whatever you do, don't blow your cool.