Refers to a big, fat ass.
Look at the size of that ass. That's a balloon bung if I've ever seen one. Bet it stinks
by Big Ed Moustapha September 06, 2008
Another way to describe someone with a big fat ass.
Here comes that Jenny Craig reject again, ol' "balloon bung". How the hell does he wipe that monstruosity. I bet he needs two zip codes for that thing.
by Big Ed Moustapha August 01, 2008