The act of rubbing your unwiped anus (typically following a bowel movement) on a doorknob, thereby leaving a slimy, shitty doorknob for the next unlucky soul who touches it.
This could also possibly be performed with a bad case of Louisiana Swamp Ass.
Additionally, it could be the icing on the cake following a good Upper Decker.
My boss totally pissed me off at work yesterday so I stayed late and left him a Greasy Pablo.
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