To cause anybody to become unconscious in a viscious way.
"Wow buddy, you just got knocked-the-fuck-out!"
"Joe, did you see that guy get knocked-the-fuck-out?"
by Sir Awesome TNA November 30, 2007
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Canadian slang;

to knock the fuck out is offering to perform oral sex. Euphemism common among the bath-houses of Toronto and Craig's List. This is unconfirmed.
Imp wants to knock the fuck out of GM.
by Steve312 January 28, 2008
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standard speech for some fool to yell on an internet fight video after someone goes down. waaaaayyyy played out.

makes me CRINGE and i immediately want to slap the fuck out the person who says it...
it always happens in the following succession:

1. first you hear: 'get em homie'... 'get that nigga'... 'fuck that bitch up'

2. then: <SMACK> ... fist to face

3. quickly followed by a: <SMACK> ... head/body hits ground

4. here it comes 100% of the time: 'AHHHHHH, YOU GOT KNOCKED THE FUCK OUT'
by sickofthepussies August 14, 2007
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