Key to the backdoor

It's a slang for the term anal. Meaning you put the male genitalia into the female's rectum.

E.G for key to the backdoor:

Male : I'll give you the key to the back-door baby!
Female : I'm not that dirty thank you... I don't like anal.

by Husky123654 December 16, 2014

backdo

perform anal sex on.

He is backdoing his wife.

by uttam maharjan May 19, 2010

backdooring

the state of using a friend’s boyfriend/girlfriend for sexual purposes.

“Backdoor your mans or I will”
“I’m about to start backdooring my dawgs this weekend”

by demmahom November 17, 2018

Backdoor Becky

A white girl who takes it in the pooper.

aye, backdoor Becky! how's your butt feel?

by bandj19801998 August 8, 2015

Backdoor Nurse

v. Known as the ultimate way to get aids, fucking someone in the ass with a needle fastened to your cock. Right when you're about to cum, pull out and inject the semen into the reciever's left ass cheek.

Tim: "I heard you had a rough night last night."
Pete: "I don't even want to talk about it. But my ass does hurt"
Tim: "Did someone give you a backdoor nurse?"

by Tim & Pete February 28, 2008

backlogger

When someone takes a shit in the back part of the toilet (the cistern), resulting in poo particles in the bowl when flushed. Normally done to someone you dislike!

1) Oh no, some one has done done a backlogger! There is shit everywhere!

2) Dude, I backlogged that bitch at the party last night!

by Phantomlogger March 27, 2011

backdoor lenny

A man who happily 'gives' during anal sex.

You should have seen McKenzie last night, he took a granny hame and by 3am his name was Backdoor Lenny

by Monkey Duster July 1, 2004