If your lookng to get really messed up really quick, this is the drinking game for you.
Anywhere from 2-12 people. Things you will need are a non-see-through cup, 1 or 2 dice (depending on how many people you have), and lots and lots of alcohol. 6 and under-one die, over six- both dice.
Sit in a circle, it does not matter who rolls first. Put the dice in the cup and then flip upside down. The person left of the roller guesses a number first. Go clock-wise and everyone guesses a number, and no number can be guessed more than once.
When someone guesses the number right, they dont drink, but everyone else does, then person that guessed the number becomes the roller. If no one guesses the number everyone drinks, and the person that just rolled is still the roller. And just keep rolling..
(Thanks Brett!)