Mah Jong is an ancient Chinese card-game that involves matching tiles to form numbers on cards in order of size from smallest (1) through largest (9). The objective: match the highest number possible. Players take turns drawing a tile; if they cant make their move, its considered "out".
If all players have matched 8 or more and there are still untaken tiles left after each player draws one card at once from his hand of cards in order to form numbers on those remaining ones (called the house), then that person wins. The game is played with a standard deck, but it can also be customized by adding extra suits like hearts for 5-card rounds or jokers as needed.