It depends on who says it, and how they say it too. If it?s a stranger (which counts people on the internet), I don?t give a fuck because they don?t know me in person. But if it?s a close friend or a relative like my older sister, then it hits hard because she?s known me for 17 years and she?s practically my mentor.
However, if it?s an acquaintance or one of my friends, I might be prone to trying to come up with some witty insult back because?well, I?m a petty, immature, and short-fused character. Otherwise, I just try to ignore them while letting my offense stir inside me. If I know they?re joking, I?ll outwardly treat it as banter, but on the inside, it depends on what they say.