Meaning of the word "lose your cool" in English

What does "lose your cool" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

lose your cool

US /luːz jʊər kuːl/
UK /luːz jɔː kuːl/
"lose your cool" picture

Idiom

to suddenly become angry or upset

Example:
He tends to lose his cool when things don't go his way.
Even under pressure, she rarely loses her cool.