A non-offensive way that one afro-american rapper uses to refer to another. Ice Cube makes use of this in Lil' John's "Real Nigga Roll Call," and he uses it at the end of every stanza he sings within the song.
"It's Ice Cube, NIQUAH. And just in time, NIQUAH. So if ya drunk, NIQUAH, Keep it crunk, NIQUAH."