Definition of "wind-bag" [wind-bag]

• In ornithology, a pouch connected with the gullet and capable of being distended with air when a bird is ‘showing off.’ Such wind-bags are present in the frigate-bird, the great bustard, and others. (noun)

The Century Dictionary (Public Domain)

• "He is doing nothing to dispel the widely-held view that he is a giant wind-bag."
• "I say he's nothing (and has never been anything) but an opportunistic wind-bag who will say and do ANYTHING that he thinks will get him elected!!"
• "He listens actively as Welsh orates, but internally he makes faces at the pompous wind-bag."