Just like beerpong but with 21 cups per person and 3 people on a team.
Picture how drunk you are after one game of beerpong then times that by 7.
21 cup is for the champs of beerpong and only the most strong and amazing drinkers can handle it.
It was invented by three sexy girls who will go down in history as the best females to ever grace the earth.
KeriLee, Crystal, and Katrina.
We bow down to you.
Tom - I want to get so drunk that I have a stroke.
Tim - Lets play 21 cup.