windbag

[ wind-bag ]

/ ˈwɪndˌbæg /

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

wind·bag·ger·y, noun

He can still come off like a windbag with a know-it-all air.

The Resurrection of Newt Gingrich |Howard Kurtz |October 18, 2011 |DAILY BEAST
The hour of all windbags does arrive; every windbag is at length ripped and collapses.

Dictionary of Quotations from Ancient and Modern, English and Foreign Sources |James Wood
He was admonished, but stood impenitent, and even "called the worthy magistrate a windbag and a sham."

Thomas Carlyle |Hector Carsewell Macpherson
In his letters during this period, everyone who differs from him is denounced as a charlatan and a windbag.

Schopenhauer |Margrieta Beer

And Mr. Spurgeon was no windbag—vox et præterea nihil; no darling pet of old women whose Christianity was flabby as an oyster.

Christopher Crayon's Recollections |J. Ewing Ritchie
For our Phineas Finn was a young man not without sense,—not entirely a windbag.

Phineas Finn |Anthony Trollope

windbag

/ (ˈwɪndˌbæɡ) /

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