Gassy \Gas"sy\, a.

1. Full of gas; like gas. Hence: [Colloq.]

Inflated; full of boastful or insincere talk. [1913 Webster]

2. passing intestinal gas excessively; flatulent. [PJC]

Source: The Collaborative International Dictionary of English v.0.48
 

102 Moby Thesaurus words for "gassy": aerial, aerodynamic, aerostatic, aery, airy, all jaw, big, bloated, blown up, bombastic, candid, chatty, communicative, conversational, dilated, distended, dropsical, edematous, effusive, enchymatous, ethereal, expansive, extravagant, fat, flatulent, flip, fluent, formal, frank, fuming, fumy, fustian, gabby, garrulous, gaseous, gasified, gasiform, gaslike, glib, gossipy, grandiloquent, gregarious, gushy, high-flown, high-swelling, highfalutin, highfaluting, incrassate, inflated, long-winded, loquacious, mephitic, miasmal, miasmatic, miasmic, mouthy, multiloquent, multiloquious, newsy, overtalkative, oxyacetylene, oxygenous, ozonic, plethoric, pneumatic, pompous, pontifical, pretentious, prolix, puffed up, puffy, pursy, reeking, reeky, self-important, smoking, smoky, smooth, sociable, solemn, steaming, steamy, stilted, stuffy, swelled, swollen, talkative, talky, tall, tumescent, tumid, turgescent, turgid, vaporing, vaporish, vaporlike, vaporous, vapory, ventose, verbose, voluble, windy

Source: Moby Thesaurus II by Grady Ward, 1.0
 

gassy adj
1: resembling gas
2: suffering from excessive gas in the alimentary canal [syn: colicky, flatulent] [also: gassiest, gassier]

Source: WordNet (r) 2.0
 

Gassy \Gas"sy\, a. Full of gas; like gas. Hence: [Colloq.]

Inflated; full of boastful or insincere talk.

Source: Webster's Revised Unabridged Dictionary (1913)