cownalingus

The stimulation of a female cows genitals by using ones mouth. Usually done by young males in the Dinka tribes of South Sudan, in order to force the cow to lactate. This is believed by many to be the reason why many African American males refuse to perform cunnalingus.

I tell ya bro, she wuz all askin me to go down on her and shit, and I telled dat fat bitch I aint doin cownalingus no mo'.