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another way of saying 'cool' or 'kool'. an exclamation that somthing is quite good, or that you have approved it.
'im going to town to but a new pair of converse'
by pepperoni September 05, 2003
the new "hippest" way to say cool(*lol), expecially when instant messaging!
IM Conversation:
monkeezrok: I got a new Guitar!!!
tammlala: Koolio!!!
by Alyssa March 06, 2004
A cool & silly dude.
Jack: i wish i didnt do my own stunts (in that moment Jack was caught in flames)

Jack: So thats what I did for my weekend.

James: Koolio man haha
by JabbaLicks June 15, 2009
A word greater than cool, so much so that it has been known that only the greatest, funny, surprisingly attractive and wise people use it
Girl: gotta go, cyaa
Boy: Oh Okay, cya!
Girl leaves
Boy: Wow, she's so Koolio!
by DJHarrington May 14, 2014
BOB: i just had really bad ice cream

JIM: koolios
by vampressa123 November 03, 2010
It means Cool or awesome, but spelled better!! its also really fun to say!!! ^_^
Person: OMG i got these cute new shoes!
You: Koolio!!
by Ya-dun-need-2-kno February 13, 2009
Koolio doesnt really have a meaning cos its made up. Its just a mutation of cool often used in instant messaging.
Bob - My head is round

Fred - Koolio
by John Da Rebel May 08, 2006