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 17, 2013

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

KSI

Fatneek lookin ass. He a snake, he steals $100 k from Vik and gets abused by his reddit (which is totally fair). He is also a secret gay who had sexual affairs with his secret boyfriend Simon Miniminter behind his TV.

Hey, im a KSI. (meaning, im a snake)

by memebot_34 October 12, 2020

KSI

A badman

oladeji Olatunji/ BabaTunde/Nightmare/Miley Cyrus's fadda(father)/KSI

by ItzRuhan786 July 6, 2019

KSI

A person who has a massive forehead, shit hair, fat tits and tiny dick. Also they are always under six feet (height) and have a god complex.

Gosh! Jimmy is such a KSI!

by Rwayne the dock Johnson August 17, 2020

KSI

A black youtuber nigga with huge fore head that is part of the Sidemen

I am a fan of KSI

by nibba360 November 26, 2019