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English definition of “have bats in the belfry”

have bats in the belfry

old-fashioned disapproving
to be silly and slightly crazy and behave in a confused wayOf unsound mindStupid and silly
(Definition of have bats in the belfry from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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Translations of “have bats in the belfry”

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