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It is another word for the region. It is also an acronym for northwest Indiana. It consists of Lake County and far west Laporte County. The acronym is used to make a not so cool place sound bad ass.
Dan: I don'y know what happened to Tommy Nuggets, he seems to be MIA.
Earl: MIA? That mothafucka ain't MIA. Mothafucka is NWI. He's mobbing deep, puffin on the dro, droppin bombs and shit.
by O.G. LOC November 10, 2007
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