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short form for knock out
see wasted
I friggin K.O.ed that guy man he was wasted.
K.O. by wow December 1, 2003
Related Words
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"
K.O by PotHeadLuverGirl April 8, 2009
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.
K.O. by theonlyones February 27, 2011
Acronym for the "Super Uber Cool Online Awesomness game" Knight Online. Or can be used o describe someone that plays K.O. entirely too much.
Ex. 1 "I play K.O. all the time... and I have a girlfriend, doesnt that surprise you?"

Ex. 2 "K.O. plays K.O. all the time... and he has the hottest girlfriend on the planet... on the game atleast."
K.O. by -{Turkey}- Lt. Emerpoc October 17, 2006
There’s two meanings, one is ok backwards and the other is short for knock out.
John: did you know k.o. Is ok backwards?

Shantiya: I friggin K.O.ed that guy when we had a fight!
K.O. by St4rb4tzz June 6, 2022

K-O-Y rule 

k-o-y rule is a simple and effective method on popular applications such as Facebook chat or AIM to get annoying people to fuck off. Basically, all you do is respond "k", "o", and "y" after everything the annoying person says. They will realize that your one letter responses seem to show lack of interest in the subject at hand. Repeat if intended subject isn't fucking off
K-O-Y rule in action:
Example 1:
Jack: Hey Phillip!
Phillip: k
Jack: Wanna hang out?
Phillip: o
Jack: Well I didn't mean to be a bother...
Phillip: y
Jack: I'M LONELY OKAY?
Phillip: k

Example 2:
David: ...and then Julie started acting strange
Phillip: k
David: But I didn't finish.
Phillip: o
David: Will you stop with that??
Phillip: y
K-O-Y rule by kkpeezout November 25, 2011
More from Urban Dictionary
A girl who does ballet and only talks about ballet. Her schedule is filled with dance classes which does not allow her to do any other activity.
"Hey, do you know that girl Sally?"

"Yeah, she's kind of annoying. All she ever talks about it ballet."

"Wow, what a Bunhead."

"Hey Sally, you want to hang out this weekend?"
"I can't, I have dance."
"You're such a Bunhead."

"Yeah... I know."
Bunhead by Jen00 October 24, 2014
Word of the Day on October 6, 2026

trucker's tan 

A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.
I had a trucker's tan after driving for 10 straight hours on a sunny day.
Word of the Day on October 5, 2026
The phenomenon where adults salivate at children's toys
Every time I walk into the toy aisle, I catch myself kidulting over the latest action figures and LEGO sets!
kidulting by Emotional Cruiser October 12, 2025
Word of the Day on October 4, 2026
British slang for a scientist or technical expert, esp . when the speaker is not certain of the expert’s specific field of study. Not necessarily derogatory, but typically used by persons without a technical background. In the US, the equivalent would be “egghead”, “squint”, or “geek.”

Origin of the word is unknown. Started sometime in World War 2. Given the typical evolution of British slang, could easily have started because what these experts did was confusing or “baffling” to the common person.
According to the boffins downstairs, the murderer used a serrated blade.
Boffin by Agnon February 11, 2023
Word of the Day on October 3, 2026

Pee Calculus

When you have to pee in a movie but don’t want to miss anything, and must do the following mental equation: will the amount I have to pee cause enough discomfort to diminish my attention capacity for the remainder of the movie to an extent which is greater than the amount of the movie I would miss by making a mad dash to the restroom.
I saw Satantango last night, wonderful film but by the 5th hour I had to start doing pee calculus.
Pee Calculus by anorlondo October 1, 2026
Word of the Day on October 2, 2026
Literally "dirty" pronounced with a West Indian accent. Can also have a positive connotation, for example Sean Paul's album title "Dutty Rock".
"The girl is pretty but she corrupt and dutty!"

or, in a positive usage:

"Booya! That freestyle was dutty!"
Dutty by J Hall April 3, 2003
Word of the Day on October 1, 2026
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