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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To be cooler than cool, ice cold, or the artist.
You're Coolio.
by Bobby Insert Name Here February 26, 2015
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This word originally was made by Rosalyn . It is a definition of something that is so cool it can’t even be described as the word cool.
Wow that guy Matthew is so coolio!!
She thinks she’s coolio but she’s just jay z
by Chickeeeeeennnnnnnnnnn August 02, 2018
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