Top Definition
"I don't know", in a slurred voice, either due to laziness, disinterest or intoxication.
A: What time shall we meet?
B: Auo.
A: What does auo mean?
B: I don't know.
A: Then why did you say it?
B: Auo.

In person:
A: Watsup?
B: Auo :|
by Orlandooo June 10, 2008

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