A sexual act of the most foul nature. Involves the male squatting on the edge of the bed in a catcher's position, while his dirty little shaft penetrates the woman's anus while her back is against the side of the bed. Then, after anal ejaculation, the disgusting couple proceed to have anal 69 with the male on top as to provide maximum perenium exposure.
So I was railing this chick when she asked for the JBR so I said what the fuck and hit her.
I gave this chick a JBR last night and she woke up with a chocolate mustache.