A poor tip; the act of giving a niggardly tip is to give a minimal, poor, low tip. Not related to the word "nigger" or black people in any way shape or form.
Server: Ugh, those black people just left me a 5% tip...
Manager: Wow, why do black people have to give such niggardly tip(s)?
a cheap, stingy person who complains to others, usually to obtain goods such as fried chicken, watermelon and kool-aid (or money to obtain the aforementioned.)
Jamal kept asking for some of my KFC today, even though he had his own meal. He's such a niggardly nagger.
For the last time, you can't borrow my bike you niggardly nagger!