The act of one's shoulder becoming aroused by any means, resulting in the shoulder to spasm uncontrollalby
Zack: Sam what's wrong with your shoulder? Why does it keep moving around?
Sam: I don't know what's happening.
Zack: Probably just a shoulgasm.
Sam: I don't know what's happening.
Zack: Probably just a shoulgasm.
by MS Track Problems January 2, 2013
Get the Shoulgasmmug.