1000 Blank White Cards

"The rules of this game are simple: get some friends and a bunch of blank index cards, draw pictures and write words on the cards, and then, keeping five cards in your hand, play them on each other. Though it doesn't sound very exciting, the game has many enthusiasts and there are many web sites devoted to it (of which this is the best)."
(found on Larkfarm)

The site cited didn't work, but I did find The Discordian Intelligence Agency Edition of 1000 Blank White Cards . See also the Seattle Electric Grimmeldeck.