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English definition of “be/go round the twist”

be/go round the twist

(also send sb round the twist) old-fashioned
to be, become, or make someone else become angry or unable to behave in a reasonable way: If I'd stayed there any longer, I'd have gone round the twist.Of unsound mindStupid and silly
(Definition of be/go round the twist from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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