Crow is a slur used to describe Blacks in a derogatory way. Relatively large black bird. Could also be a reference to "Jim Crow", a popular 19th-century minstrel song that stereotyped African Americans, which later was used as the name of the Jim Crow laws, which enforced racial segregation in the South.
The word Crow 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 Crow, it is best to err on the side of caution and avoid using it in any situation.