2
A Sexual Maneuver involving a boss who has been sexually harassing their employee. The employee has to sleep with the boss and upon reaching climax, look into their eye and say, "I'm suing you".
You know the groping boss? Derp pulled The Koi on him and got 1.3 million in damages.
by i_am_the_koi March 30, 2015
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3
1) Large species of carp
2) Vibrating dildo that can send your woman to the moon and around several stars.
I used my koi last night and came so hard I soaked the sheets
by Koi_Girl February 23, 2004
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4
A sigh of exasperation, apathy, happiness or really any emotion. Can be seen as an exaggerated form of "K". The use of ka as a suffix can be used to indicate the degree of apathy.
Peter: Hey Kevin, do you wanna come over to my place and study for our english exam?
Kevin: Kakoi, ceebs not in the mood.

Jim: Nice ten page essay Pete.
Pete: KOIII, more like 2 pages, idk what you're on.
by nicosenpai November 21, 2017
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7
a person that looks sexy like steven lu
wow, look at that koi girl go!
by lu February 21, 2005
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