Top Definition
Masterbating while watching a blood relative have sex this excludes relatives that mary into family. This action is something that is not enjoyed but done in order to make the situation even more akward then it already is.
I walked in on Uncle Phil and Aunt Katy going to Slam City and I became arroused.

Aren't they brother and sister?

And thats why I sat down and faught through the horrible image with a shazingo special.
by killuhcrow April 28, 2011

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