Meaning of “lose your temper” in the English Dictionary

american-english dictionary

"lose your temper" in American English

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lose your temper

also lose your cool/lose it

to become very angry:

Michelle wanted everybody to like her so much that she just lost it if someone got mad at her.
When I feel like I'm about to lose my cool, I just leave the room.

(Definition of “lose your temper” from the Cambridge Academic Content Dictionary © Cambridge University Press)