Uni-brow is a slur used to describe Greeks in a derogatory way. They tend to have hairy the eyebrows that often meet and appear as one. Also applies to some Italians.
The word Uni-brow 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 Uni-brow, it is best to err on the side of caution and avoid using it in any situation.