a small or trivial lie; minor falsehood.
verb (used without object), fibbed, fib·bing.
to tell a fib.
Origin of fib
1560–70; short for fibble-fable nonsense, gradational compound based on fable
1. See falsehood.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
a trivial and harmless lie
verb fibs, fibbing or fibbed
(intr) to tell such a lie
Word Origin for fib
C17: perhaps from fibble-fable an unlikely story; see fable
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
1680s, from fib (n.). Related: Fibbed; fibbing.
1610s, of uncertain origin, perhaps from fibble-fable "nonsense" (1580s), a reduplication of fable.
Online Etymology Dictionary, © 2010 Douglas Harper