Everyone thinks I'm posh?Watch
I briefly had this issue in secondary school, which had a big mix of backgrounds. Sometimes people were right that I was posher than them, and I just let them joke about it - I have many advantages in life because my parents are middle class professionals, so it's really not that bad if I get teased by people who are less lucky. But one girl was from a similar background to me and still made a big deal out of how posh I was, and it felt mean-spirited and just annoying, so eventually I stopped hanging out with her. I guess what I mean is, poshness is relative and that maybe dictates how you should respond.