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Acronym for "Don't worry about it, forget about it." Can be used to tell someone your business isn't theirs, or just to fuck with someone when answering a question you don't feel like giving a real answer to. See DWAI
Example one:

Jim: Whats good man?
Dan: Not much, how 'bout you.

Jim: Why are there all those bruises on your face, did you get into a fight?
Dan: DWAIFAI

Example 2:

John: Who is your ISP?
Dave: DWAIFAI
John: Wha?
Dave: DWAIFAI
by peaceking January 11, 2010
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