Quadroon is a slur used to describe African americans in a derogatory way. A person who is 1/4 Black. Coined during the Civil War, referring to how White you had to be in order to serve in the army.
The word Quadroon is a racial slur that has been used historically to degrade and dehumanize african americans. The word is still used by some people for this purpose, and it is seen as offensive and hurtful to african americans. If you are unsure about whether or not it is appropriate to use the word Quadroon, it is best to err on the side of caution and avoid using it in any situation.