KSI

A fatneek.

KSI is a fatneek

by King Rexington III July 28, 2021

KSI

A raper who is very successful and make YouTube video and is a professional Boxer

Hay that is KSI from YouTube

by Tux_YT December 9, 2019

ksi

fatneek

that fatneek ksi over there

by anonymous October 1, 2020

KSI

Some shit hole who beats up people in a box with wires surrounding them and then somehow wins. he even says some words with some instruments playing sounds in the background and he says the word in a tune. he sucks at both.

Theres people like Swarmz who should get more recognition, hes the coolest person in the world, Hes so good at rapping and boxing no one can do anything to him. KSI sucks!

Man: Hey bro do you know KSI.
Man 2: Yeah, Do you like him?
Man: Yeah, hes kinda funny
"Gun Cocks"

by Monkey Melon Car October 8, 2022

Ksi

A fat neek

You heard of that UK ksi he a pissboi

by Nigeriaboi123 September 9, 2020

KSI

An Egotistical knobhead

“Oi that KSI is such a cunt Yano”

by kenningtonbaby November 30, 2024

KSI

Short form for 'kiss simone immediately'.

Has a 12 inch d*ck. Overall a sexy beast.
And the goat youtube boxer. And a damn good rapper.

Heyy look who's here 'ksi' omg he's the best.
I wish i could learn boxing from him!

by Dammmmmnboi November 25, 2021