means 'Watch Out!' except 'wich oww' is usually exclaimed loudly and obnoxiously in a high voice.

is usually used to tell someone to watch out for stupid things.
Wich oww i'm gonna throw this book at you!

that guy has a gun wich oww!

*batter hits foul ball into stands* WICH OWW!
by Mc Soolis May 26, 2009
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