backdoor top shelf 

when you can't decide which hole to put it in and you are in a group so you don't wanna say you just fucked a girl in the ass, because that is kinda crude. it is when you have butt sex but will not be confused with doggy style sex

friend 1: dude, i fucked that one chick

friend 2: no way whatd you do

friend 1: i went backdoor top shelf on the ho

backdoor top shelf by bonerwars99 April 26, 2010