Description from Kheper Games website:
"Players select one of the drinking assignment die colors to represent each player or each team of 2+ players. Then players take turns rolling the dice. The brown die tells you who drinks, and the other dice determine how much. Perhaps the highest or lowest numbers drink, the last person to perform a gesture drinks, or the losers of a silly contest drink. Contest ideas are included on the back, such as: hairiest ass, loudest belch, dirtiest joke, or best armpit fart. This is a game for 2 to 100 players!"
The game comes with five six-sided dice, each with text on all faces. The brown die indicates the action and the other dice are alike except that they are colored blue, yellow, orange or purple, to represent four different teams. The game has no stated objective or winning conditions, but presumably it is the same as all drinking games - to get away with drinking the least (or you may prefer the most).
Amusingly, this drinking game comes with a warning, "Not to be played with alcohol".