F**ktionary is a dirty word game. In each round, a player reads a word from a card out loud and the other players attempt to come up with plausible definitions. Points are scored for then guessing the correct definition or for opposing players guessing that your definition was the correct one. From the website: "Contains 300 obscene, crude and lascivious words. Players generate credible unwholesome definitions. Score points by guessing the correct definition, or by others voting for your repugnant answer."