Grease Ball/Bag is a slur used to describe Greeks in a derogatory way. Possibly because of the grease they sometimes put in their hair or because of the types of food they make. Also: Greaser. Applicable to Italians, Greeks, and Hispanics.
The word Grease Ball/Bag is a racial slur that has been used historically to degrade and dehumanize greeks. The word is still used by some people for this purpose, and it is seen as offensive and hurtful to greeks. If you are unsure about whether or not it is appropriate to use the word Grease Ball/Bag, it is best to err on the side of caution and avoid using it in any situation.