Top Definition
Without warning, as usual. This is when something you know will happen happens, but as always, it happens randomly without any warning.

Pronounced: Wow-Aooooo or Wowuuuuuuu.
My mom would smirk as she said: I have to bump you guys off the internet.

WoWAU, I'd think.
by Name-42 January 10, 2010
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