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
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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
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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
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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 13, 2020
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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 18, 2020
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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
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KSI

oladeji Olatunji/ BabaTunde/Nightmare/Miley Cyrus's fadda(father)/KSI
by ItzRuhan786 July 06, 2019
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