The Lord High Executioner of Titipu in Gilbert and Sullivan's masterpiece The Mikado. Ko-Ko is usually played by a baritone. He is generally considered the male lead in this operetta, and while he sings during almost every song, his only true solos are "I've Got a Little List" and "On a Tree By a River."

At the beginning of the operetta, Ko-Ko has been condemned to death for flirting, but the Mikado releases him and makes him the Lord High Executioner. His ward Yum-Yum is to be his bride, but she is in love with Nanki-Poo, the Mikado's son, who is in turn lusted after by a noblewoman named Katisha. After the entire cast attempts multiple times to sort out their mangled love lives, Ko-Ko finds love with Katisha, and they sing their famed duet, "There is Beauty in the Bellow of the Blast."
Ko-Ko has been played by such talented actors as Martyn Green and Eric Idle.
by Pitti-Sing June 24, 2006
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A Korean... with a mad temper....or a korean friend that you just wanna call a terrorist....
Dude, that Ko Ko is Out of control
by Sean McDermott January 23, 2004
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Kos means female pussy in Persian/Farsi language. This word has extensive applications in variety of forms, similar to the word "fuck" in English literature. Such as: Koskhol, kos-e-sher, kosoo, kos lis, koskesh, kosdeh, kos-baghali, kosde, khar-kosde, kose-nanat, kose-abjit, kos-bazi, etc
Afshin, eyk kos lis! Baz dobare omadi inja kos-bazi? Bas kon in kos-e-sher haro!!
by Sassan August 29, 2007
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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
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"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 19, 2014
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informal,noun,means cunt in persian language.
1 A pretty woman.
2 Nonsense,rubbish.
1 Look at that pretty girl,she's such a kos.
2 Hey man,don't said kos anymore!
by Mamrez Erfani April 19, 2008
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