OK backwards. Originally from Short Circuit 2 (1988), K.O. Derf is OK Fred backwards. Became more common with the rise of chatrooms and IM with people who can't or don't waste time trying to type well.
fred: are you ok?
#5: Functioning 100%. Perfectly K.O., Derf!
fred: it's fred
#5: That's what i said, Derf!


im user 1: i gtg
im user 2: wait bring that cd tomorrow
im user 1: ko durf ttyl
by joefitz July 19, 2005
1)K.O. as in "knocked Out" can be used in life when someone is unconcious and also appears in fight games when there is a victor and the loser is K.O.

2)the dyslexic way of saying OK.
(I have a dyslexic friend and this is her joke, its not meant to be hurtful or nasty in any way)
PersonA: hey PersonB, u want to go to the movies?
PersonB: ko

PersonA: Im going to knock u out
PersonB: ... *is knocked out*
PersonC: K.O.!
by ThatGirl January 13, 2005
short form for knock out
see wasted
I friggin K.O.ed that guy man he was wasted.
by wow December 01, 2003
totally intoxicated
unable to stand / speak
short for "knocked out"
that boy drank too much - he's k.o.
by will December 11, 2003
"KO" is the equivalent to the meaning & abbreviation of the letters meaning "OK" and was used on "Mork & Mindy", which is a t.v. series that had aired from 1978 to 1982. Mork is one of the main characters in the series, and an alien from the planet Ork. He would commonly reverse the proper order of human words and phrases that he spoke, by mistake
"Owie! Shazbot, shazbot, SHAZBOT! I stubbed my little toe when I tripped over the footstool Mindy, and it hurt!!! You didn't even ask me if I was KO!!!"

(Mindy replies)
"Oh, Mork! I'm sorry- did it hurt? I think you meant to say that I didn't ask you if you were "OK", on Earth we ask if you are OK if you hurt yourself, not "KO"!!!

***Proper credit must be given to the true comic genius of Robin McLaurin Williams (July 21, 1951 – August 11, 2014) R.I.P.
by green eyed lady 13 August 18, 2014
Stands for "knock out" in reference to going to sleep or taking a long nap and mostly used as a verb.



"Yo, come thru to this party, mayne!"
"Nah niqqa, i'm bout to k.O"
by PotHeadLuverGirl April 08, 2009

1. a knockout

2. to knock someone out
If he manages to KO him every time he'll be braindead pretty soon.
by Light Joker March 23, 2007
K.O. is a abbreviation for Kill Opponent.
K.O. is commonly mistaken for Knock Out by naive pokemon game players.
Squirtle! Use Water Gun!

Squirtle has K.O.
by theonlyones February 10, 2011

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×