Buttazzle

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 bottom please, do yourself a favor and don't accentuate it with a buttazzle kit."