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mad as a hatter

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English

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Etymology

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First recorded 1829. Of uncertain origin, though usually explained as referring to hat-makers suffering from Erethism due to handling mercury-contaminated felt. Derivation from Old English ātor (poison) or its descendant English atter lacks evidence.

Pronunciation

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Adjective

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mad as a hatter (not comparable)

  1. Crazy or demented.

Synonyms

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Translations

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