Define Schwaa Meaning

when playing a new card game, one would say "schwaa" when they dont understand what the hell is going on

Girl 1: Did you see Becky's hair?
Girl 2: No, why?
Girl 1: It's lime green with yellow highlights
Girl 2: Schwaa???

Like when you're throwing a frisbee, you say "Schwaa!!!"

When a knacker goes up to another knacker, and to act like hard ass hey will scream "SCHWAA", like any animal in the wild trying to act scary, or fend off threats