Nubian Princess is a slur used to describe Blacks in a derogatory way. Originally was a compliment for Black women, grew popularity from the movie "Friday" then was commonly used mockingly under mentality that a Nubian meaning African even with a title of princess is still a Nigger.
The word Nubian Princess is a racial slur that has been used historically to degrade and dehumanize blacks. The word is still used by some people for this purpose, and it is seen as offensive and hurtful to blacks. If you are unsure about whether or not it is appropriate to use the word Nubian Princess, it is best to err on the side of caution and avoid using it in any situation.