A pile of naked women getting it on with each other and / or other men. Most likely to occur during an orgy, multiple girls on one guy, or just a pile of lesbians having fun.
Guy: Did you go to that wild orgy last night? I didn't see you around.
Girl: I was at the bottom of that 5 girl Piggy Pile enjoying myself.
Girl: I was at the bottom of that 5 girl Piggy Pile enjoying myself.
by J "Assman" T March 01, 2011
When one sorority girl slides her fingers / hand inside another sorority girl's vagina during the passion of their lesbian encounter.
by J "Assman" T March 01, 2011