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