Splort: Any damage that simply didn't need to be rolled. For example, a character who had jumped from the plane only to find his chute was still safely under his seat, or, in a supers game, when a character attempted to steady a building that had been knocked over by a villain with demolitions. As the building began to teeter over, the character realized that not only was he not strong enough, he couldn't push enough, either. Splort.
School Bus: I had a set of yellow dice with black pips-- highly visible-- that I required new players to use so that experienced players could help them figure totals, etc.
Short bus: a set of similarly-colored very lage dice I bought specifically to address one player's habit of blatantly lying about his rolls.
Captain @$$-saver: Any NPC who was sent in specifically to ask in a booming God voice: Are you guys _sure_ this is what you want to do?
Dandy: Recovering D&D player.
WelfareMan!: Character with absolutely no possible way to make a living or live a life outside of combat. Usually had obscenely potent attacks and combat skills. Couldn't think his way out of a wet paper plot device.
Spandex Commandos: supers in general, particularly the 'gritty' type, such as Batmunch and Punisher.
Rapist: player who felt it to be an essential part of the game to exploit every meta-aspect of the rules at every possible moment-- Gamism run to psychosis. Usually found playing WelfareMan.
Mason: player who _always_ played a brick. See also Shriner.
Stripper: the guy who _always_ played a woman, no matter what. And usually a comely one, with identical personality in every genre, and every campaign. See also things I won't say in public.
Roundhouse Rex: any character that relied on Haymaker but refused to understand the CV penalties involved. Sometimes for years.....
Dice Storm: I think we all know what this is, and I think most gamers call it that.
You know, it occurs to me that I've been gaming too long......
I need to stop, because I think my group may have a book-length lexicon in the works!