Knocking on the Door 

When a man slaps (knocks) the head of his dick on top of the woman's clitoris in order to open the lips (door) to her pussy. Can also be applied to a woman's nose and her mouth.

Dick: Knock, Knock
Pussy: Who's There
Dick: I'm knocking on the door, open up!
Pussy: Cum on in.....

Knocking on the Door by Mr. VanV August 12, 2011

Mr Hankey is Knocking on the Door

Means to have to defecate or have a bowel movement or to have to take a dump. Mainly used for an emergency situation, where the movement in imminent, but can be used for any announcement of your condition.

Remember that jalepeno burrito I had earlier, with the ice cream sundae and Heinekins for dessert? Well, Mr Hankey is knocking on the door about now!!

I've been sick all day, and I think Mr Hankey is knocking on the door again.

Mr Hankey is Knocking on the Door by PALABRAMAN July 17, 2009

knocking on the back door 

Pressing the tip of one's erect penis against a woman's anus in the hope that she'll agree to anal sex. This technique is futile 99.753% of the time, but persists due to the collective male delusion that women secretly love to be invaded in this way.

Boyfriend: (knocking on the back door)

Girlfriend: How many times do I have to tell you??? Get that thing away from there!!!

knocking on the back door by Carl Pinkerton May 16, 2009

knocking on the back door 

When a man feigns an attempt at anal penetration in order to startle his partner.

Woman: I told you I don't do that!

Man: Don't worry, I'm just knocking on the back door.

knocking on the back door by wiggy_G November 20, 2009

knocking on the back door 

During anal sex, the person that is doing the penetrating and thrusting is the one that is doing the "knocking," and the anal opening is, obviously, referred to as the "back door."

When Eric and Amy are in bed, he's always knocking at the back door.

knocking on the back door by Zeeky H. Bomb March 19, 2005

knocking on the back door 

n. when a man attempts anal sex without requesting verbal permission. Often involves either precursory acts such as foreplay (rimming, anal fingering) or preceding acts (spreading of ass checks, tapping head of penis on anus, pushing the tip of the penis onto the orifice without full insertion) to signal one's attempt at anal intercourse.

After doing it doggystyle with Jackie, I started knocking on the back door. She didn't object so I totally stuck it in her butt until she screamed.

Richard Johnson kept knocking on the backdoor last night in bed, but I told him to stop since I barely know him.

knocking on the back door by calisp August 1, 2013