knocking out the donkey

to fuck a girl in the ass, and right as you're about to cum, you punch her in the back of the head so she tenses up.

The best orgasm I ever had was knocking out the donkey.

by Deez Nutz May 30, 2004

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.

by calisp August 1, 2013

The Gentleman's Knock

Slapping or smacking a girl's crotch with your boner and then proceeding to not sleep with her.

"That slutty girl thought she was going to get it good, but he ended up giving her the Gentleman's Knock."

or

"He was too much of a gentleman to get in there, so he just knocked."

by Amynonomous May 13, 2014

knocked off the block

being hit in the face at full force by a fist!

smoothal got is going to get knocked off the block by shawn im so kool

by shawn im so kool April 15, 2005

knock over the pepsi

When a teacher searches for the definition of a random string of words during a health class. It must sound like something sexual related but really isn't. You can replace "pepsi" with "soda", "coke", or any other drink.

Student: "What does it meant to knock over the pepsi?"
Teacher (searches it up): "I don't know." (Finds urban dictionary result) "You got me."

by IbeatMrCook June 7, 2010

The Irish Door Knocker

The act of pulling your pants down, letting your balls hang and slapping them back and forth repeatedly hitting each leg.

Steve and I were hanging out the other day and then he decided to whip out The Irish Door Knocker, fuckin' weirdo.

by somethingstupid March 15, 2010

The Portage Double-Knocker

When you hit someone in the testicles, in which they fall you give them the Titanium Teabag

I gave that dude that walked in The Portage Double-Knocker. He deserved it.

by 11NSM94 July 23, 2011