slopfest
(n.) 

1.) a girl who gets so severely intoxicated at a party that despite how good looking she may  be, her rambling and overt slutish behavior turn her off to everyone (sometimes can be used toward a male, but that can be risky)

2.) a party that is either one of epic proportion or spans more than two consecutive days (the latter party mainly occurs with large groups of hippies)
"Damn girl, you are quite the slopfest tonight!"

or

"Remember that time I sold my Volkswagen and bought enough LSD to keep us tripping for a week? That was a total slopfest, man."