When you are getting it on with somebody anally, totally in the moment enjoying the friction and tightness of a firm
asshole and they happen to cum so
hard that they
literally shit on your balls and completely ruin the moment!
When you visit your
doctor cause your peehole stings like a
motherfucker and you think it's because of the bacteria from all that butt
fucking, only to have the doctor tell you. "No sir... it's not bacteria, it's the Clap!" That is when you have the right to yell "Shitballz!"