Greater than cool and koolio it is when someone or something is at there highest amount of cool. Only koolio people use this word in there everyday language.
Strange man: Yo that was so cool!
Girl: No that was koolio
Both: NAW MAN THAT WAS THE KOOLIOEST THING EVER
Girl: No that was koolio
Both: NAW MAN THAT WAS THE KOOLIOEST THING EVER
by @yourmomsaweeb April 9, 2023
Get the koolioestmug.