(Also known as Bartok and Warthog).
A card game, which begins very much like Uno, except that each time a player wins a round, e gets to invent a new rule. Generally, new rules are restricted by the players' sense of fairness, and meta-rules are not allowed. The game is complicated by the initial rule that "If a player asks a question, e must pick up a card."
This game is meant to be very silly, and can be lots of fun.
I have put a file containing the initial rules, and some suggested extras which I have played successfully in the past, up for ftp at 
ftp://ftp.cse.unsw.edu.au/pub/users/malcolmr/nomic/other_games/bartog.txt