Meaning of “be off your head” in the English Dictionary

English

"be off your head" in English

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be off your head

mainly UK informal

to be crazy:

You must be off your head going out in this weather!

UK to not be in control of your behaviour because you have drunk too much alcohol or taken drugs:

Hannah was off her head as usual.

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