Redbone is a slur used to describe Blacks in a derogatory way. Used by darker-colored Blacks to refer to Blacks with a very light complexion. Origin unknown. Link
The word Redbone 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 Redbone, it is best to err on the side of caution and avoid using it in any situation.