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1.
The floppy, slit-looking mush of skin a person has when he/she leans to the side, resulting in smashing all the meat/skin/fat together. Happens to most people unless they're supermodels.
Person 1: Dude, did you see Bobby's side vagina?

Person 2: Yeah, I wanted to put my penis into that lusty layer of skin.
by Aceywantsyoursoul June 20, 2012