The class of one being "Too pro" for parties, gatherings, meetings, etc. "Niggerpro" comes from the origin of black people being excluded from society. See nigger. A Niggerpro is the antonym of "Nigger". Where one is so involved in something, he becomes to cool for it. Therefor he is not excluded
Christian: "I'm too pro for this party. In fact, I'm a niggerpro"