What does it mean when a guy says that you have a "fat ass"?

Anonymous
i was in class and this guy said that i have a fat ass and kept saying "damn" it happens to me a lot and i dont know what to do? im a white girl in a mostly a black and hispanic school and guys see me in the hallway and scream stuff like "that shit dont belong on you" what does this mean? is it a bad thing?
What does it mean when a guy says that you have a "fat ass"?
5 Opinion