Someone who isn’t a nigger.
Damn, George W. Bush is the biggest unnigger that I know!
Once a nigger becomes an unnigger, if they become a nigger again are they a renigger?
Unnigger: define #2
To fix; make right again. To return a stolen object.
When failure to pay a fine leads to a suspension of your license.
“I am not going to pay that fine until they unnigger my shit!”