bats in the/one's belfry

idiom

Definition of bats in the/one's belfry

informal + old-fashioned
to have bats in the belfry or (chiefly US) bats in one's belfry is to be crazy an old woman with bats in her belfry

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“Bats in the/one's belfry.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/bats%20in%20the%2Fone%27s%20belfry. Accessed 27 Feb. 2021.

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