In the gambling world, particularly pool and other cue sports, an air barrel refers to an empty barrel (barrel meaning wager or a unit of money remaining in one's possession) which a player or gambler passes off as a full barrel he/she has in order to play a match or set.
Asia "Cantnobodyholdmedown" Cycak totally brought an air barrel to California to play OMGWTF in their high stakes match!
by SkyscraperChris April 13, 2011