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14.
ko
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.
Ko
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
 
2.
short form for knock out
see wasted
I friggin K.O.ed that guy man he was wasted.
by wow December 01, 2003
 
3.
ko
totally intoxicated
unable to stand / speak
short for "knocked out"
that boy drank too much - he's k.o.
by will December 11, 2003
 
4.
K.O
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
 
5.
KO

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
 
6.
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
 
7.
KO
A Canadian Musician with most of his songs about smoking weed. Give him a listen.
Hey man did you hear that new KO song about him selling crack when he was younger?
by lolidkwtnm July 01, 2011