Instead of being a social individual, I decided to spend the entire night fetty wacking it. 1738 ayy!
by itsthemagictuna October 30, 2015

by jim bab June 8, 2019

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

by .yA BoI. August 17, 2018

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

by tooms July 30, 2008

by h*r fan March 3, 2004
