Koi Boi

A Japanese frat daddy

Man A: What's a politically incorrect term to call a Japanese frat daddy?
Man B: Koi Boi.

by dookiemikey August 18, 2017

Koi Boy

A severely amazing, blissful, underrated song by god himself, the legend Jack Stauber.

Person 1: "You're such a koi boy."
Person 2: "What-"

by Miss Connie <3 April 9, 2023

Koi Boy

Someone who is a big fish in a small pond who thinks they're fancy but are really pretty basic.

Ex. That koi boy is always popping off.
Ex. That koi girl thinks her shit is high fashion when it's five and dime

by Niafabo August 5, 2023