KSI

A big Fatneek. A person who loves to lose weight even though it doesn't work.

My brother's a real KSI, he doesn't give up.

by dutchdorm September 17, 2021

KSI

A god with good music and sick hair.

This KSI dude is alright. I’m gonna put this on my playlist!

by Madness Ting Train July 30, 2021

KSi

a fatneek

"LOOK AT THAT FATNEEK OVER THERE!"
"IT MUST BE KSI!"

by bigbatty123 September 12, 2020

KSI

A snake that has chosen money over ,a loyal friends

That snake KSI needs to pay back vikkstar
He's not mad just disappointed. smh

by KrMkRm October 05, 2020

ksi

a person with a strong ashy elbow that can knock a 40 year old out cold

that dude with a massive forehead and snake hairs is ksi

by urbenwrongspell June 06, 2023

ksi

a guy with the thiccest forehead. Also he's a fatneek

ksi is an ksi

by Sahan__ October 10, 2020

ksi

fatneek

ksi is a fatneek

by lightblazing December 19, 2020