Verb: Using rhinestones to decorate the butt area of one's pants, or other items of clothing, or even one's personal self (like being vagazzled, only on the backside private regions rather than the front).
Past tense: buttazzled
Present tense: buttazzling
Perjorative noun: (you) buttazzler
Upon viewing some waddling pedestrians: "If you have an ugly bottomplease, do yourself a favor and don't accentuate it with a buttazzle kit."
It is said of the situation where a person has the bad luck to make contact with his testicles against an undefined surface or object, intentioned or not.
Given the nature of the word, it is more appropriate to design cases where the interaction is made with a moving object, for example, a ball.
Although it is extremely painful for the victim, it tends to be considerably funny to people who witness it.
Today in the baseball game the pitcher took a nutshot; the baseball hit him in the nuts.
Man, I just watched the funniest nutshot video ever.