Meaning cool, but typically used as a one word response and not part of a sentence.
Quaay says, "Hey, Inde, I just bought more ram for my computer!"
Inde replies, "Coolio!"
by Quaay July 04, 2004
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When something is cool and awesome but in a dorky or cheesy manner. Such as pee wee herman, the fraggles, or watching the clouds pass overhead as you listen to owl city and sip on tea.
Sweet! I'll definately play hungry hungry hippos. That game is mad coolio.

Star wars is so coolio.

Obeying the law, getting good grades, and saying no to drugs. Darn, if those those things aren't coolio then I don't know what is.
by Kent Owens November 06, 2011
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A fag version of the word cool. Please do not use it.
Guy 1: Yo dude that shit was coolio!
Guy 2: Fuck off.
by Slayer of gay words October 21, 2010
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Coolio is a word that originates from the word 'cool'. Many people use it as a substitute.
The people who use the word are trying to be unique and try to be different.
40 year old man : 'Woah, my action man is so coolio!'
by piano_226 February 27, 2007
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US rapper, famous for multi-million selling song "Gangsters Paradise". In January of 2009, Coolio entered the Celebrity Big Brother house in the UK.
Coolio is so coolio!
by Tibbins January 09, 2009
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