windbag

[ wind-bag ]
/ ˈwɪndˌbæg /

noun

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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for windbag

windbag

/ (ˈwɪndˌbæɡ) /

noun

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