I always heard a mung was the rag that they use to wipe up the bar at closing time, and the drink that would be wrung out of it a "mung-rag." Similar to a mat drink, but more disgusting, I think. As for OP, hmmmm disgusting... yeah, I dunno, some things people gotta do, and if you keep them to yourself when you ought to then at least you're trying.
