mad as a hatter

idiom
Updated on: 15 Nov 2017

Definition of mad as a hatter

informal + old-fashioned
: severely mentally ill : crazy
  • He's a nice fellow, but mad as a hatter.

Word by Word Definitions

mad play
  1. : arising from, indicative of, or marked by mental disorder

  2. : completely unrestrained by reason and judgment : unable to think in a clear or sensible way

  3. : incapable of being explained or accounted for

  1. : madden

  1. : a fit or mood of bad temper

  2. : anger, fury

  1. : very, extremely

hatter play
  1. : one that makes, sells, or cleans and repairs hats


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