Skank Planking 

The act of planking on a female while having an intimate moment, it could be watching a romantic comedy or getting freaky. Results vary greatly.

Roger: Dude I went Skank Planking on Cindy last night.
Eric: Sweet, how did she react?
Roger: She bit my calf...

Skank Planking by iMOOSE24 August 18, 2012

Spank Planking 

The act of discretely masturbating while planking.

His facial expressions made it look like he was spank planking on top of the bench.

Spank Planking by David B Weingarten September 24, 2011