Coca is a slur used to describe Mozambicans in a derogatory way. Term used by the Portuguese referring to white people from Mozambique. From "Coca-Cola".
The word Coca is a racial slur that has been used historically to degrade and dehumanize mozambicans. The word is still used by some people for this purpose, and it is seen as offensive and hurtful to mozambicans. If you are unsure about whether or not it is appropriate to use the word Coca, it is best to err on the side of caution and avoid using it in any situation.