KSI

A person who says they are taller than they actually are (Erin)

"I'm 5'2" "Everybody knows you are 5'0 stop being such a KSI"

by iliterallydontknow June 24, 2021

KSI

He is a monkey

Omg look who’s in the tree in the jungle it’s KSI

by Wiener5556678 August 14, 2019

Ksi

a stupid black man that only dates white girls and has never seen a black pussy a day in his life. and has a big forehead and is fat asf.

ksi can’t pull black girls
damn ksi has a big forehead
ksi has deji issues

by miniskirtgirl May 8, 2020

KSI

A guy who thinks that its weird to get hyper in 2021 because he is too cool.

WOW. GET HYPER. MUCH CRINGE.

- KSI 2021

by XX_POGSTAR_XX February 19, 2021

KSI

KSI is when you have a big forehead and wears bandanas 24/7 to hide it, if you are relatable to that then you are a KSI
KSI stands for Killing Stupid Idiots

KSI is stupid

by KSI LGBT March 2, 2019

Ksi

A very toxic youtuber that insults older people. Calls women hoes.

Dude you seriously watch ksi he’s toxic

by @theamazingpaulbros on ig August 10, 2018

Ksi

A black person who couldn't win a fight against somebody who filmed a dead body wtf

Ksi is alpha male

by Blacksaregay November 14, 2018