tìm từ bất kỳ, như là blumpkin:
 
1.
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
viết bởi Balllllsack 07 Tháng bảy, 2010