1. (noun) (Ni-Kai-Ah) replacement of the word or words "Nigga", "What the fuck", "What the hell", "Shit", "Bitch", "Fuck" and any other word that can fit.
1. Nighiagh!

2. Nighiagh! Did you see that shit?!
3. What up nighiagh.
by FriendlyNieghbor December 06, 2010
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