This word is a new cute way to say cool. It is mostly used by females. This word is also usually used in text messages.
Micha: Um.. do you wanna go on a date with me?
Erica: Yeah! That would be nice!
Micha: oh! I'll pick you up, tomorrow at The Git at 5:05?
Erica: Coolio! I guess it's a plan!
When something is so cool, it is unexpressable by the word cool alone so the term "Coolio" is used instead.
Luke: I just finished this masterpiece
Penny: Coolio!
This word is claimed by Ashley Applegate, and means cool but is coolio, like a io game, but Ashley owns it
Damn Ashley Applegate claims this word that’s so coolio
It is the combination between words, cool and polio.
Random kid: alright lets go to the park
Other random kid: coolio
Random kid: who the fuck invited this dude
(next day that kid drowns the other one)
A response that your grandma, mom, or aunt says.
You: Hey auntie I got a new phone!
Aunt: coolio
Coolio: Saying something is cool in a funny sarcastic way.
"Look idiot! I got a new phone"
"Coolio"