Knuckle-Dragger is a slur used to describe Blacks in a derogatory way. Often believed that black people have longer arms than other races and therefore their knuckles would drag.
The word Knuckle-Dragger 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 Knuckle-Dragger, it is best to err on the side of caution and avoid using it in any situation.