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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
Koi by Koi_Girl February 23, 2004
Related Words
Koi Koichi koibito Koit Koi Boy Koi Fish Koi Pond Koi Ponded koiki KOIN
This is a Japanese fish

or in my case me because I named myself koi forgetting the fact that koi is a name of a Japanese fish
Koi by KoiTheDuck November 17, 2021
Koi might not be the smartest but he is really funny, maybe even the funniest in your class. He is very enjoyable to hang around with and generally a nice person. Also he is a eshay
Koi Is Very Funny
Koi by Fjfjfhensjdifivibib April 27, 2019
a word used to describe the extent/intensity of awesome-ness something holds
Koi Maza Aya
koi by KoiMe June 12, 2011
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.
Koi by i_am_the_koi March 30, 2015
dude im so koi on that guys deal, captain koi.
koi by antrochrist666 April 22, 2013