Meaning of “lose your head” in the English Dictionary

american-english dictionary

"lose your head" in British English

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lose your head

informal

C1 to lose control and not act in a calm way:

He usually stays quite calm in meetings but this time he just lost his head.

(Definition of “lose your head” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"lose your head" in American English

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lose your head

to not have control of your emotions:

Everything went dark, and I just lost my head and couldn't think what to do.

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