Chink is a slur used to describe Asians in a derogatory way. Asian equivalent of "Nigger" for blacks. Two possible origins: the dictionary definition is "A narrow opening or slit", meaning a reference to their eyes. Or could also refer to the sound of someone working on a railroad, which Chinese immigrants helped
The word Chink is a racial slur that has been used historically to degrade and dehumanize asians. The word is still used by some people for this purpose, and it is seen as offensive and hurtful to asians. If you are unsure about whether or not it is appropriate to use the word Chink, it is best to err on the side of caution and avoid using it in any situation.