“Fart” is a flammable gas that our bodies produce and eject which is often set on fire by some people
“Knock” comes from “engine knock” is when the fuel in an internal combustion engine prematurely combust in the cylinder (damages the engine)
“fart knock” is when a person attempts to set their own fart on fire, but end up combusting his/her fart before it goes out of the anus, as a result, his/her anus is blowed up or barbecued from the combusting fart
“Knock” comes from “engine knock” is when the fuel in an internal combustion engine prematurely combust in the cylinder (damages the engine)
“fart knock” is when a person attempts to set their own fart on fire, but end up combusting his/her fart before it goes out of the anus, as a result, his/her anus is blowed up or barbecued from the combusting fart
My friend went to the hospital, because he tried to set his fart on fire, but ended up with Fart Knock
by Person #37878678 September 5, 2021

by Rovich68 January 18, 2015

by monkeybreastmilk October 17, 2008

by pezzy July 10, 2006

"Janie got knocked down the other day when she visited the clinic for an abortion."
-"Dude, my brother knocked down his girlfriend yesterday."
-"Oh, she finally got that taken care of at the clinic?"
-"Na, my brother just punched her in the gut."
-"Dude, my brother knocked down his girlfriend yesterday."
-"Oh, she finally got that taken care of at the clinic?"
-"Na, my brother just punched her in the gut."
by apena89 November 26, 2007

Harry: Did you guys ever go nigger knocking when you were kids?
Chris: What?
Harry: You know, nigger knocking, where you ring someone's door bell and then run away.
Chris: Do you mean ding-dong ditch?
Harry: Yeah!
Chris: That's the most white-trash way of describing that pastime I've ever heard.
Harry: Uh, well--
Chris: --But I like it much more.
Chris: What?
Harry: You know, nigger knocking, where you ring someone's door bell and then run away.
Chris: Do you mean ding-dong ditch?
Harry: Yeah!
Chris: That's the most white-trash way of describing that pastime I've ever heard.
Harry: Uh, well--
Chris: --But I like it much more.
by Dr. Octagon January 11, 2008

To implant semen in the womb for the purpose of uniting with an egg to form a fetus, therefore stopping menstruation and causing the body to expand as the fetus grows.
The purpose of Tyrone forcing sex on Brie Ann, the prom queen, was to knock up the queen and also to knock her off the throne and change her attitude. Brie Ann had been rubbing him the wrong way for months. Now she could think about this for years.
by Richard Black April 7, 2005
