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1 definition by XratedMaiden

Lines that ur anus crack leaves in ur undies or on things one might sit upon.
Skid Marks in ur undies: Usually smelly poopie turd. May vary in color.

Skid Marks on things u sit on: Could be blood from women who sit on the seat cover while they are on the rag, can also be poopie turd.
by XratedMaiden December 04, 2002