Finally a thread I really know something about...
Tip the Cup~ Was a perenial favorite my pledge semester, we played girls against boys at parties and had the best time, and got pretty darn drunk.
F*ck You~ make a pyramid of cards with 6 cards across on the bottom going on, up make sure you put the cards face down. Then deal out the rest of the cards to everyone playing, evertone should have a few cards. Then starting at the lower right flip over a card, count to three, if your card is the same i.e. there is an 8 in the pyarmid you can put down an eight, if you put down a card you say f*ck you Susie, or who ever and they have to drink. Two or three people might have that card, but have to put it down before you count to three again. The last person you got f*cked has to drink the face value of the card times the level, i.e second level times 2, thrid, times 3; now here is th catch the last person who had to drink counts the time for you, its hell, but fun and a quick drinking game.
Up the river down the river~ Line up cards like for solitare, then try to make it down the line guessing higher or lower, if you are wrong you drink the face value of the card and have to start all the way up the river... this works trust me I know...
I also am a huge fan of sorority drinking songs we have learned quiet a few that double as drinking games.
There are others, but I was to drunk to remember the rules sober
P.S. Does anybody know how to play Rat Sh*t? I played it once, and don't remember how...