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adjective, flab·bi·er, flab·bi·est.
  1. hanging loosely or limply, as flesh or muscles; flaccid.
  2. having such flesh.
  3. lacking strength or determination.

Origin of flabby

1690–1700; apparently expressive alteration of earlier flappy, with same sense; see flap, -y1; compare late Middle English flabband (attested once), evidently with sense “flapping”
Related formsflab·bi·ly, adverbflab·bi·ness, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for flabby


adjective -bier or -biest
  1. lacking firmness; loose or yieldingflabby muscles
  2. having flabby flesh, esp through being overweight
  3. lacking vitality; weak; ineffectual
Derived Formsflabbily, adverbflabbiness, noun

Word Origin for flabby

C17: alteration of flappy, from flap + -y 1; compare Dutch flabbe drooping lip
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

Word Origin and History for flabby

1690s, variant of flappy, which is recorded in the sense of "softly fleshy" from 1590s; see flap. Related: Flabbily; flabbiness.

Online Etymology Dictionary, © 2010 Douglas Harper