Nork is a slur used to describe North koreans in a derogatory way. Self Explanatory
The word Nork is a racial slur that has been used historically to degrade and dehumanize north koreans. The word is still used by some people for this purpose, and it is seen as offensive and hurtful to north koreans. If you are unsure about whether or not it is appropriate to use the word Nork, it is best to err on the side of caution and avoid using it in any situation.