Well there's always the one approach which always works. Agree with them.
If they call you a Nerd or something and you say "Yeah, i'm a nerd, and ?" It takes the fun out of it for them, Ifd they call you gay, or something which agreeing would be worse thne answer in a calm sensible, British way, like "Gay ? Ofcourse I'm not gay haha, well I'm off, good day to you"
:3
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