A northern slang term for masturbation. To play with oneself, or toss oneself off.
"I'd love to come with you, but I'm in the middle of knocking one out"
by RichieLeBon February 10, 2012
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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
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It’s when someone is in love with a person so they have little play fights (flirting) which means you have W RIZZ
Girl: You smell

Man: I’m gonna knock you out now if you don’t shutup
by HUNDESUNDEHUNDESUNDE man January 14, 2023
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to work hard to achieve something, usually implying success
Wow, Mary! This is a great party. You really knocked yourself out.

It seems every time you give a party you really knock yourself out.
by Kim Dammers June 11, 2008
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A woman so attractive you want to get pregnant to keep her.
The attractive level must surpass a desire to not have children. It will even override common sense however the woman must be a true beauty, not a decent one.
1. That Naomi Komaki is so hot I want to get her pregnant so she would have to stay with me. She's a real knock up knock out.
2. That knock up knock out is so hot I put a hole in the condom.
by Eater of Cherries September 24, 2004
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Mid 90s urban culture terminology for defeating another person in any sort of competition, whether it be gaming, boxing, killing, etc.
N.W.A. Song "Straight Outta Compton" -

"Me and you can go toe to toe, no maybe

I'm knockin' niggaz out the box daily"

Ex. 2-

Man, I can kill you at Mortal Kombat II.

Oh yeah, I'll knock you out the box, bitch!
by gregatron5000 June 28, 2009
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