iono 

shortened version of "i dunno", which is a shortend version of "i dont know", which is a shortend version of "i do not know"

Iono where your pencil is, find it yourself!

iono by karate December 7, 2003

iono 

Basically the same thing as iunno, it is a quickened version of "I do not know", used in both chatting and in informal speech.

It's history may trace back to Homer Simpson, who often makes a sound that is in between "iono" and "iunno". (Says a lot about his intelligence, doesn't it?)

PersonMan: So, whatchu up to tonight?
TriangleMan: iono. How bout j00?
PersonMan: iono.
TriangleMan: das coo.

iono by Mallio November 19, 2003

iono 

retarded way of spelling i don't know

whats for dinner
iono
stfu

iono by Ben February 7, 2004

iono 

12 year-old internet chatter's way of saying "I don't know."

What are you doing this weekend (besides using the computer)?

Iono.

iono by Isi Oamen February 8, 2004

Iono 

Slang for "I don't know"

Steve: "How's this look?"
Jerry: "Iono. Okay, I guess."

Iono by IKe February 7, 2004

iono 

1)uncertainty
2)used when answer is unknown

Yo Mang! What's the weather look like today? He then replies,"IONO".

iono by bill February 3, 2004

iono 

This is the slang version of the phrase, "I don't know?"

iono ho, r u a boi or a grl?

iono by chris g October 26, 2003