first of all, it is important not to really be concerned about people who label you as overweight. second, it is important to take proactive measures in dealing with rude people, such as blocking or ignoring them. In times that you happen to find people who dislike or irritate you, one thing you can mostly do is to stand up for yourself, while also you may choose to not talk at all to them. You might probably say "I've tried that many times" or something like that but really, try getting to be calmer and if you can't then breath In your lungs and tell that person you won't be talking to them anymore and if they continue to respond, ignore. It's not back and forth.