Means Cheap or Stingy.
Which means its definitely not referring to blacks. Black people are inherently wasteful, and spend all of their money or your money through welfare. Wether it is on Lotto Tickets, Malt Liquor, or Fried Chicken, often their funds are exhausted the same day they get their check, usually on the "first of the month".
See Nigger Rich
Black Bum: "Yo can you help a brotha out? Spare a quarter?"
Working White: "No, sorry I don't have any cash"
Black Bum: "Yo why you bein so Niggardly?"
Working White: "Why are you being such a Nigger?"