Fart Knock 

“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

My friend went to the hospital, because he tried to set his fart on fire, but ended up with Fart Knock

Fart Knock by Person #37878678 September 5, 2021

fart knock 

when someone knocks on your ass until you fart much like shart knock

i like to fart knock on my animal

fart knock by vhcuo0gogfd May 10, 2014

fart-knocker 

One who impacts a fart in the rectum with his penis.

"Keep your back to the wall!", shouted Ned. "There is a fart-knocker loose in the museum!"

fart-knocker by bleccch22 March 22, 2010

fart knocker 

Originally slang for male homosexual, but the phrase has been used so widely (mainly by second-graders)that it now can mean almost anything.

1. I think Devon must be a fart-knocker. 2. Hey, fart-knocker, your cheating!

fart knocker by Ben Carmitchel, IL April 25, 2003

fart knocker 

Reference to anal sex, basically a variant of "fudge packer." Usage hijacked and generalized by the Beavis and Butthead show in the 90s.

Those fart knockers are outside the gay nightclub again having a smoke.

fart knocker by Janet90232 October 24, 2007

fart knocker 

n. someone who is a loser or a moron; used as an insult by Second Graders

SHUT UP! You're a fart knocker!

fart knocker by Saint Shaggy November 5, 2002

fart-knocker 

A dumb ass

My boss is a fartknocker.

fart-knocker by Fartknocker girl June 19, 2003