Nig is a synonym for the word "Nigger" it is a fast and easy word to say without being racist. It practically is a early access N-word.
NE Farmer talk for a hammer/striking object, also can be used as a veiled racial slur when using said hammer as part of the act of "bodging" something to where it'll work
Hey fetch me that nig, I'll put a couple more nails in this fence.
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Wes Pandy's repair of a baler using a block of wood, some twine and a hammer was a real rigger nig
The art of a Nigga who practices martial arts in an attempt to rise to the challenge of life.
"Master Pastor Kusanigger, how do I master the art of Nig-Fu?"
"Get me more fent, and I will tell you..."