Some kind of sport apparently. A term that can be applied to either gender.
Ballbusters
The artwork here is by the great Poser artist, Nerraw. Nerraw helped me selflessly with Skeleton Girls for the best part of six years, but most of our IDs were deleted and almost all of our groups. Bianca Ballbuster turned up after an absence of seven years.
http://groups.yahoo.com/group/biancaballbuster