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1. An area stain caused by male or female ejactulation fluid, either wet or crusted over.

2. A stupid idiot; an untrustworthy person; flashier word for asshole.
1a. The maid peeled back the top layer of Ken's bedsheets to reveal a mass infestation of scumplotch.

1b. Dude, do NOT borrow any of Ken's blankets, there are scumplotch marks all over it!

2. Ken is a fuckin' scumplotch, man - do not trust that guy. And don't shake his hand either.
by The Dirty Doll August 19, 2006
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