Sambo is a slur used to describe Indians in a derogatory way. Derives from the traditional children's story, "The Story of Little Black Sambo" about an Asian Indian who had dark skin.
The word Sambo is a racial slur that has been used historically to degrade and dehumanize indians. The word is still used by some people for this purpose, and it is seen as offensive and hurtful to indians. If you are unsure about whether or not it is appropriate to use the word Sambo, it is best to err on the side of caution and avoid using it in any situation.