English Explanatory Dictionary

have bats in one's belfry

English dictionary entry

Meanings

verb
  1. To be crazy or eccentric.

Word forms

have bats in one's belfry has bats in one's belfry having bats in one's belfry had bats in one's belfry have bats in the belfry

Etymology

1899, from tendency of bats to fly around erratically, with “belfry” indicating “head, mind”.

Derived words

batshit batty
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