When a group of people, or skinny bitches, go skinny dipping, uninvited, in a random person's pool, or a targeted pool of their choice, in the middle of the night.
The whole rush of it is not getting caught! I mean, unless you're into that kind of kinky shit.
(P.S.: FAT PEOPLE AREN'T INVITED).
Vagner: "Let's go skinny bitchin' tonight!"
Dick: "Yeahh! Let's get fuckin'naked!"