When you have anal sex for about five minutes,right before you ejaculate you pull your penis out of their anus,shove both testicles into the anus and punching your partner in the back of the head while masturbating until ejaculation all over his or her back all in one motion.
1) A female who gains power over a male by causing pain to his testicles (commonly "nuts"). Although it can include any kind of "nut" attack. The female most often employs her legs for the task, because of their relative proximity to the groin, and because the legs of a female have the needed stregnth to hurt a male without injuring him.
2) A female who humiliates, belittles, injures, chastises, dihabilitates, or otherwise causes distress to a man through non-physical means.
1) Guys ignore Amy's reputation as a ballbuster when they see her nice legs; at least until she kicks them in the nuts.
2) "That Amy is a real ballbuster; not only did she kick me in the nutsunder the table, she used my weakened state to make me agree to her plan."