Any social gathering, with a vested interest in the intermingling of men and women, in which the ratio of men to women is in the order of n:1, where n is some number greater than two.
Dude 1: So how was the party last night?
Dude 2: There were, like, no girls there.
Dude 3: Yeah, like 3 guys for every girl.
Dude 1: Cockfest!