mad(redirected from as mad as a hatter)
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Related to as mad as a hatter: as dead as a doornail
mad(mad), This imprecise and outmoded word is best avoided in medical speech and writing. Negative or pejorative connotations may render it offensive in some contexts. A nonmedical, pejorative term for:
2. Mentally ill; insane.
Farlex Partner Medical Dictionary © Farlex 2012
An antiquated term, now used colloquially, for insane or mentally ill. It should not be used in a professional context, as it bears an offensive and pejorative overtone.
(2) Rabid, frenetic.
multiple anomalous dispersion
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
1. Not rational.
3. Rash, foolish, frantic.
4. Suffering from infection with rabies.
Medical Dictionary, © 2009 Farlex and Partners