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[daf-ee] /ˈdæf i/
adjective, daffier, daffiest. Informal.
silly; weak-minded; crazy.
Origin of daffy
1880-85; daff (obsolete; see daff1) + -y1
Related forms
daffily, adverb
daffiness, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for daffy
Contemporary Examples
Historical Examples
  • Theodore had got to the ladder that made the last part of the ascent, and there daffy had collared him.

    Marriage H. G. Wells
  • Take the lancets, Jonathan, and the basin too, and a bottle of daffy's Elixir.

    Ben Comee M. J. (Michael Joseph) Canavan
  • What usually happens to the men who are associated with you in any enterprise: they get daffy over you.

  • Deacon's Australian, you know, and they're daffy down there on colour.

    A Son Of The Sun Jack London
  • I kind of laughed when I felt it in my hands --I reckon I was some daffy with the sensation of excitement.

  • My dear mother packed a bottle of daffy's elixir in the barrel of my pistol.'

    Micah Clarke Arthur Conan Doyle
  • He is the happy and enthusiastic pastor of a large and growing congregation, which congregation is simply "daffy" about him.

    "Say Fellows--" Wade C. Smith
British Dictionary definitions for daffy


adjective daffier, daffiest
(informal) another word for daft (sense 1), daft (sense 2)
Word Origin
C19: from obsolete daff fool; see daft
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for daffy

1884, perhaps from daft (adj.), or from obsolete daffe "halfwit" (cf. 15c. daffish), of unknown origin. With -y (2). Related: Daffily; daffiness.

Online Etymology Dictionary, © 2010 Douglas Harper
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Slang definitions & phrases for daffy



  1. A male lover, esp one who keeps a younger mistress; sugar daddy (1920s+ Black)
  2. The most respected man in a field; cynosure; dean: Gary Cooper, the daddy of all cowboys (1901+)

Related Terms

disneyland daddy, ho-dad

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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