look up any word, like bae:
 
2.
Unno is the latest in a long line of Proper English words unwillingfully sodomised so that they are fit for internet consumption.
jayseven: Unno watya onboot teh dud!
jayseven's dad: I don't know what you're on about, son!
by jayseven July 28, 2004
19 19
 
1.
Same meaning as "dunno", which comes from "don't know", except it's shorter and easier to type when IMing
Guy: what time is the party at josh's house?
Girl: i unno, go ask stephanie
by krystal_kiss February 16, 2006
15 13