Octoroon is a slur used to describe Mixed races in a derogatory way. A person who is 1/8th Black. Originated by the Spanish in the 14th/15th century as they were very exact in their racial classifications to determine a person's worth in society.
The word Octoroon is a racial slur that has been used historically to degrade and dehumanize mixed races. The word is still used by some people for this purpose, and it is seen as offensive and hurtful to mixed races. If you are unsure about whether or not it is appropriate to use the word Octoroon, it is best to err on the side of caution and avoid using it in any situation.