KSI

Short form for 'kiss simone immediately'.

Has a 12 inch d*ck. Overall a sexy beast.
And the goat youtube boxer. And a damn good rapper.

Heyy look who's here 'ksi' omg he's the best.
I wish i could learn boxing from him!

by Dammmmmnboi November 25, 2021

KSI

If you know a KSI then they would most likely ruin your family at christmas and never get invited to a roast ever again.

My friend KSI fucked his mum at christmas and was never invited back home.

by dead boyyyyyy May 21, 2020

KSI

Ksi is a black dirty nigger who has a brother that made a Diss track on him including all his 'nemesis' which is better than any other song he has made in his entire music career

Ksi is a dirty nigger who has no taste in music.

by Ksithenigger November 14, 2019

KSI

A cool London rapper / Boxer / Youtuber who likes spending money on things like 500k anime necklaces and 200k watches just for tax returns

He also beated Logan Paul twice, what an absolute unit

KSI demolished that silly boy logan paul

by Jon does sugar November 10, 2019

KSI

Fatneek

KSI's a fatneek

by Pillow42 January 28, 2021

Ksi

A Amazing Person With a Good sense Of Humor Who Wants to Inspire People with his Facal Expressions and That Laugh of his

KSI : Amazing Entertainer

by KsiFan👊 July 22, 2020

KSI

KSI is an animal with a BIG BIG forehead and a FATNEEK with a crappy beard.

KSI is a fatneek

by KSIhaveAbigFOREHEAD June 29, 2021