Definition - What does Ball Buster mean?
Ball buster is a term that pertains to a person who is domineering and aggressive. It is a vulgar term that is mostly used to describe women although it is also a term used in BDSM community for certain Dommes who provide verbal abuse as a service (and in a consenting relationship).
Kinkly explains Ball Buster
Using ball buster to describe a person is often done maliciously. Using it to describe a woman is often perceived as sexist outside of the BDSM community.