A specific variation of the act of coppulation, where as the contributing party (usually being male) assumes a saddled position over the receiving party (usually female or sometimes domestic animal) and proceeds to "give the dog a bone" rectally.
by DirtyD November 04, 2004
by Black Cloud 99 December 30, 2016
by JoE bLuD November 08, 2006
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
friend 2: no way whatd you do
friend 1: i went backdoor top shelf on the ho
by bonerwars99 April 26, 2010
by Jok3r22890 October 06, 2018
The act of taking a group shower during which enough steam is produced to set off fire alarm systems, thereby luring sexy firemen who are then invited to join the group shower.
This shower is losing steam, boys. Let's get a Backdoor Fire Drill going, and get some meat in here!
by Dirty Dave and the Power Botto September 23, 2018
when girl is sexy and a guy wants to have sex with her he might say he'd love to smash her back doors in, in the act of sex
by MrHighway March 25, 2011