Definitions by lukemh97

black bison

A black bison is a sexual act in which a male has anal sex with a female, while the female simultaneously shits on his dick. Then as the male prepares to ejaculate the woman deepthroats his penis, swallowing both the male's semen and her own feces.

My wife finally pulled a black bison with me last night, it was awesome.
The black bison is my favorite sexual act.

black bison by lukemh97 July 8, 2012