Dirty Knees is a slur used to describe Arabs in a derogatory way. In reference to the daily Muslim prayings on their knees
The word Dirty Knees is a racial slur that has been used historically to degrade and dehumanize arabs. The word is still used by some people for this purpose, and it is seen as offensive and hurtful to arabs. If you are unsure about whether or not it is appropriate to use the word Dirty Knees, it is best to err on the side of caution and avoid using it in any situation.