A spontanious beating of the shaft. It is a very uncontrollable sensation. This is very common when one is hard.
Wayne: Man, my wacking shaft is really uncontrollable.
Courtney: That's understandable, wacking shaft happens to alot of guys i know.
Emily: Yeah, my brother had wacking shaft the other night
Courtney: That's understandable, wacking shaft happens to alot of guys i know.
Emily: Yeah, my brother had wacking shaft the other night
by Balllllsack July 9, 2010
Get the wacking shaftmug. by .yA BoI. August 17, 2018
Get the Hella Wackmug. Male masterbation. Commonly used as a slang term describing the sexual acts of one, like "Beat the Meat."
by Paso Robles Slang March 9, 2010
Get the Wack the Birdmug. by tooms July 30, 2008
Get the wacked offmug. by h*r fan March 3, 2004
Get the wiggity wackmug. by Elizabeth n Nick April 10, 2006
Get the Mad Wackmug. To have the sudden urge to masturbate in a public place, usually a restaurant, and to then start beating off savagely.
by d00d April 27, 2004
Get the wack attackmug.