aiab Share definition Flag All In Ass Bandit. A type of donkey in poker (usually free games) who bets all their chips way too often. Call him if you've got anything. It doesn't matter when he pushes since he's an AIAB. aiab by obbyyoyo October 8, 2006 0 0 Get merch Get the aiab mug. Buy Now — $32.95 See more merch