Cabbie is a slur used to describe Arabs in a derogatory way. A large portion of cab drivers seem to be foreigners, mostly of Arab or Indo descent.
The word Cabbie is a racial slur that has been used historically to degrade and dehumanize arabs. The word is still used by some people for this purpose, and it is seen as offensive and hurtful to arabs. If you are unsure about whether or not it is appropriate to use the word Cabbie, it is best to err on the side of caution and avoid using it in any situation.