Informal. an empty, voluble, pretentious talker.
the bag of a bagpipe.

Origin of windbag

late Middle English word dating back to 1425–75; see origin at wind1, bag
Related formswind·bag·ger·y, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for windbag



slang a voluble person who has little of interest to communicate
the bag in a set of bagpipes, which provides a continuous flow of air to the pipes
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 windbag

late 15c., "bellows for an organ," from wind (n.1) + bag (n.). Figurative sense of "person who talks too much" is attested from 1827.

Online Etymology Dictionary, © 2010 Douglas Harper