Sockboarding 

(Noun) The act of masturbation utilizing a sock or women's panyhose.

"Man, I have to do laundry. All of my socks are tarnished from sockboarding."

Sockboarding by Thecore March 9, 2010

Cockboarding 

The art of leaving drawings of cocks on whiteboards and posters in the office to be found by your work colleagues. These are sometimes hidden by other office items for impact when found e.g. whiteboard erasers.

Man, you have been cockboarding all over the office and it's hilarious.

Cockboarding by DeLeaCious October 21, 2015