a ball-off 

Two men inflicting damage upon each other’s nutsacs in a duel to see who has the toughest testicles

“We’re having a ball-off Julian, stay out of it!”

a ball-off by White wyne May 30, 2020

suck the chrome off a ball hitch 

a woman with such amazing blowjob skills that she could wrap her tongue around a ball hitch and suck the chrome off it.

"so dude, how was it?"
"man, it was amazing... she could suck the chrome off a ball hitch."

suck the chrome off a ball hitch by anti March 6, 2005