Meaning of “out of your mind” in the English Dictionary

british dictionary

"out of your mind" in British English

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out of your mind

unable to behave or deal with things normally because something has made you very worried, unhappy, or angry:

She was out of her mind with grief.
I'd go out of my mind if I had to do her job all day!

informal extremely stupid or mentally ill:

You must be out of your mind paying £500 for one night in a hotel!

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

"out of your mind" in American English

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out of your mind

crazy or behaving in a crazy way:

You have to be out of your mind to go swimming when it's below freezing outside.

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