Ksi

it stands for knowledge Strength Iceland

John: im ksi
his dealer:Okay

by Yinkas grandma June 9, 2020

KSI

Big Black Youtuber who beat Logan Paul and has a big forehead

Hey do you think KSI has a big forehead.

by Ur Step Dad's Brother January 21, 2020

KSI

The champ who will be known forever in history for his fantastic rematch against the fucking prick logan paul

i love KSI

by Fuck logan and jake paul November 13, 2019

KSI

KSI (Kissing Sphincters Indiscriminately) are a community of anilingus enthusiasts on XBox Live.

John: Dude, why does the mic on this headset smell like ass?
Jeff: Oh, I joined KSI the other week and they made me sell my toothbrush.

by Big Jez October 18, 2013

ksi

A nigga with a carrot penis who defeated logan paul in a boxing match

oh he has a carrot penis, he must be ksi

by DarkAegis January 5, 2020

Ksi

A rapper who has knowledge, strength, integrity and none of the above. He claims to be “bulking” so he doesnt cry at night over his fans fat shaming him for going to Nandos everyday, and also wears a bandana because he is too insecure over his jimmy neutron forehead.

“Ksi is a fatneek”

by Meme dictator January 15, 2021

KSI

Someone who is not what they are or Fatneek
KSI stands for Kiss Simon Immediately

Your are a KSI because you were a Fatneek

by Neutralice March 13, 2022