Meaning of the word "lose temper" in English

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

lose temper

US /luːz ˈtɛmpər/
UK /luːz ˈtɛmpər/

Idiom

to suddenly become angry

Example:
He tends to lose his temper when he's under a lot of stress.
Try not to lose your temper with the children.