ballbuster means: 1. A male who causes pain to the testicles of a female. Also known as “nuts”, It can also include “nut” attacks. Because of the proximity of her legs to the groin and the fact that the female’s legs have enough strength to harm a male without him injuring them, the female uses her legs most frequently. 2. A woman who insults, humiliates or injures a man using non-physical methods. (in Community Dictionary, added by Gabriel Fernández)