The act of burying your face into the vaginal canal; simutaniously forcing one's fist into the rectum and striking oneself in the face, there by knocking oneself out.
I totally gave that bitch the ostrich knock out the other night.

I gave a sweet ostrich knock out.

Would you like an ostrich knock out?
by the real k-fed December 12, 2007
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The title of the boxing video game that is featured in the music video for 50 Cent's Piggy Bank. This imaginary video game features 50 Cent as the best and strongest boxer, who takes on all of his real-life enemies in the boxing ring. Those enemies appear symbolically, as maybe the producer of the video game wasn't able to make all of their faces in 3D. Among the rappers getting knocked out by 50 Cent are Jadakiss, Fat Joe, and Nas. Game is never in the ring with 50, but he is featured as a Mr. Potato Head. This, of course, led game to create the retaliatory song "Mr. Potato Head", featuring Phat Rat, which many consider knocks out Piggy Bank.
Dude 1: Hey dude, you wanna play a video game?
Dude 2: Not unless it's that boxing game from Piggy Bank.

Dude 1: Haha, Rapper Knock-Out. Who are you gonna be?
Dude 2: Foo! 50 Cent of course! I wanna win.
by Rodzilla November 2, 2005
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when a person a made a conscience decision to pass out at a party which will take them out of the fair game to be fucked with.
dude lets marker joes face

nah dude he's shoes knocked out ...... its not rite

lets get brian he still has his shoes on
by Dante El Picante February 2, 2010
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To get layed out cold with a very powerful punch
Mann youd get KO'd if you got in a fight wit me.
by hatabitchsmacka February 6, 2004
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The act of a person being hit on the button. Usually the chin or behind the ear. Then going unconcious.
I saw a mma fight and guy got hit hard on the chin by a punch. He dropped and layed on the ground frozen for about 20-30 seconds. He got knocked out cold.
by sage thunder June 12, 2010
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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 31, 2004
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1. In Baseball or Softball, to achieve a home run by hitting the ball so hard that not even the player who stayed home with his sick kids could catch it.

2. A single hit that is so vicious that its effects are felt for a while afterwards, usually through flying backwards, falling to the ground, writhing in pain, and throwing up. Bonus points if you do it with a baseball bat.
Aaron tried to sneak up on me while I was blindfolded, but I kicked him in the groin, which caused him to be knocked out of the park.
by El Singario February 11, 2006
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