It is derived from: "I do not know"
It was changed to: "I don't know"
Then: "I Dunno"
Finally: "Iunno"
It was changed to: "I don't know"
Then: "I Dunno"
Finally: "Iunno"
by Kavkid June 11, 2006

It is derived from: "I do not know"
It was changed to: "I don't know"
Then: "I Dunno"
Finally: "Iunno"
It was changed to: "I don't know"
Then: "I Dunno"
Finally: "Iunno"
by Kavkid June 11, 2006
