1. An exclamation of astonishment; to be in a dodgy situation - Similar to oh-oh or oh-no
2. To make a mistake, to not make sense, to correct oneself.
3. A warning; when one enters an inappropriate situation
Definition 1:
Dude: ...so she rolls over, and right underneath her, was a pile of cat turd!
Guy: Udha! Thats bleugh!
Definition 2:
Dude: So i was smoking some cock last night...
Guy: Smoking what!?
Dude: Udha, I meant crack - crack, not cock.
Definition 3:
Guy: Hey man, Wheres the porn!
*Parents walk in*
Dude: Udha! What are you talking about?
by Blackstump November 11, 2003
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