Origin of flab
First recorded in 1920–25; back formation from flabby
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- unsightly or unwanted fat on the body; flabbiness
C20: back formation from flabby
Word Origin and History for flabs
"fat, flabbiness," 1951, back-formation from flabby.
Online Etymology Dictionary, © 2010 Douglas Harper