a man that has massive balls that hang low, similar to a bull.
I can tell he has Bull balls cuz his package is HUGE!!
by Sailboatking June 13, 2015
The original truck balls or truck nuts are scrotum look-alikes that rednecks hang on the back of their trucks to let people know that they drive a masculine vehical.
What a joke, see them pingpong balls under that truck? Must be a kiddie driving. He should get some REAL bulls balls.
by jrBman August 26, 2006