It is a combination of two words:
Nigro which means black in latin.
And philia that means love or attraction.
Making it Black love which is love of black people/africans/afro-americans/jamaicans ETC...
That guy has hard nigrophilia! he digs black chicks.
Cosbro #1 - Dude, did you see that chick who did a tauntaun-bikini outfit? With like furry feet and horns?
Cosbro #2 - Yeah, she really {Nigri}'d the fuck out of it.