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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.
by Mortachi September 08, 2006
Someone who is sleazy and tacky. They could have slick hair, be a bit of a playa, suck up to people, anything like that.
I was hit on by some greasy pablo last night.
by Some Minion January 22, 2005