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1.
stage after blue waffle, it is so hairy and black that it looks like the head of a bison
she was so wrecked, and it was a black bison
by blackbison July 06, 2012
 
2.
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.
by lukemh97 July 06, 2012