Ksi is a British youtuber who got famous for playing fifa in his moms basement and the got famous for dressing as a teletuby and played a song called “get hyper” after that he became a professional music artist and professional boxer now he reacts to his subReddit and covers his forhead with a bandanna.
by Poopoopepe6969 July 23, 2020
Get the Ksimug. 
KSI is a fatneek
by KSIhaveAbigFOREHEAD June 29, 2021
Get the KSImug. 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
He also beated Logan Paul twice, what an absolute unit
by Jon does sugar November 10, 2019
Get the KSImug. Person 1: Who’s KSI?
Person 2: Oh hes the one that is “bulking” and always says “ALLOW IT MAN” and also says “RAAAA”
Person 2: Oh hes the one that is “bulking” and always says “ALLOW IT MAN” and also says “RAAAA”
by oktivaa November 26, 2021
Get the KSImug. 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
Get the Ksimug.