Terrone is a slur used to describe Italians in a derogatory way. Southern Italians. Any Italian living more south than Rome, very offensive, describes living standards and cultural differences from the more European north. The Italian word "Terra" means land or dirt so a Terrone is one who works with the land.
The word Terrone 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 Terrone, it is best to err on the side of caution and avoid using it in any situation.