A condition where the labia droop like a damp, wrung-out washcloth, after having been used in a vigorous washing. SPS is prevalent among sluts, ho's, skanks, hood rats, and the like, however, SPS is less common among bitches. There is no known cure for SPS.
"Dude, be warned, that chick has a serious case of saggy pussy syndrome, her box is as sloppy as wet shit. You might as well be fucking a bag of shaving cream."