Scrob is a slur used to describe Icelanders in a derogatory way. What fisherman and dockers call Icelanders. From "Scrod," which is a 19th century word for young cod fish.
The word Scrob is a racial slur that has been used historically to degrade and dehumanize icelanders. The word is still used by some people for this purpose, and it is seen as offensive and hurtful to icelanders. If you are unsure about whether or not it is appropriate to use the word Scrob, it is best to err on the side of caution and avoid using it in any situation.