knock the back door in and put the extension up

Polite euphemism for anal sex, just crying out to be written into an updated Carry On film based around DIY enthusiasts.

Jack Douglas : "I'll be finished as soon as I've knocked her back door in and put me extension up"
Sid James : "Hwar har har!"

by TC Raymond August 15, 2005

knock yourself out

to incapacitate or render oneself unconscious by means of physical, or mental, abuse or deprivation to one's own body.

"You are ridiculous. Knock yourself out now!"
"There is no way I can win this race. I might as well knock myself out!"
"I was about to kick that guy's ass for the way he was talking to my girlfriend, but he knocked himself out already."

by Fat Boy Canada October 8, 2009

knock down ginger

The game where you knock on someone's door and run away. also called knock up ginger, or knock knock ginger.

"I'm bored, let's play knock down ginger on that house"

by sunnybunch April 15, 2005

cock knock

to be knocked with someones cock

Frodo likes to be knocked with big hairy male cocks

by anarki May 24, 2004

Nig Knock

A (usually Southern) Rap song that features lots of hi hat, synthesizers, and cocaine distribution references. Young Dro, Yo Gotti, Gucci Mane, Gorilla Zoe and Young Joc are the leading artists in this genre.

Hey bro, turn off that Dave Matthews and turn up the Three 6, we're about to pick up some bitches, and you know they love a good Nig Knock.

by HCTILLIFORGET April 26, 2009

knock the dew off the lily

to urinate

"OK, I'll be ready to go once I knock the dew off the lily."

by Anonymous July 18, 2003

Knock the C out

To get hit so hard that the C is knocked out of you.

The "C" in question is a mouth guard used in sports. Such as Boxing or any other close combat sport.

I'm gonna knock the C out of you.

by POOP-FACE April 27, 2009