A motivated and eager way of saying What's up. It originated from people pronouncing What's up differently(Whaasaa). It is commonly used as a method of answering calls.
by Edie.edie September 8, 2010
The statement that says, "What the fuck are you talking about" and "Huh, I really don't understand you, would you kindly repeat yourself" in one word. Use in moderation.
"I walked up a flight of stairs and saw this big figure staring down, and the pigs were eating horses"
"Wahuh?"
"Wahuh?"
by Ronchi December 17, 2003