1. Noun: Suspect stains, normally dried sperm or sex stains but can be used for any unidentified stain. May be on any surface, though fabric is usually more permanent.

2. Verb: The act of making stains that will later be suspect to a party at a later time. -ed -ing -s
1. Oh, dude. This motel room is full of pittyswains.

2. Sorry man, me and this girl totally pittyswained all over the back seat of your car last night.
by S. P. D. July 18, 2010
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