Interchangeable with Anyway, but the distinction being that Anywhoo is more friendly, casual, and text-message or informal/casual-email friendly.

It can sometimes denote a transfer of interest from the writer's business to the reader's. It can be a way to denigrate oneself in deference to the more-important reader.

Or it can simply a way to write-off what one just said or wrote. It can be a way to make light of the subject at hand and change the subject with humor of a somewhat-undefinable word.

It can be spoken as "Any who" or "Any whoooooo ... "

It spins from the Yoo-hoo fruit drink/chocolate milk slogan, "Wherever your action is."
by Candycasa November 25, 2009
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A more funky,radical and random way of saying anyways
Anywhoo....watzup with you?
by KENDAHLYYY May 26, 2005
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