A morbidly obesefemale (or faggot), usually promiscuous or an escort, who's purpose is to repeatedly slam themselves into your nutsack.
Guy 1 - "That bitch straight BOUNCED off my balls yo, she must've been 650lbs or some shit. Total nutcrumpler."
Guy 2 - "Dude your nuts must've been CRUMPLED!!"
Causing the man's testicles to retract, so the man doesn't feel them in their original state. This will make it feel as if they are numb and/or removed.
Yeah, I saw this guy who sprayed hairspray on his dick.
- Ouch man, I can imagine the nutnumbing pain.