There was this guy in my high school who was absolutely relentless. Always making fun of my head. Such a juvenile sense of humor, really. My head isn't even that big! But now I find out it's caused from hydrocephalus and my skull swelled during development because of the added pressure and fluid. I have a very minimal case of it, and it just made me even more peeved that he picked on me for something I really couldn't help, that was caused by a medical condition. His bullying caused a lot of body issues for me cuz I still worry that I look different, even though the Doctors say my head is normal. I used to cry every night over it cuz I have an uncle (who we now know has hydro too) with a big head and I thought I looked like a big-headed man. :/
Another harsh one - during an argument with my ex, she called me a "crater face". I can't remember most of the insults she threw at me (most were far worse), but that one will forever stick with me. She was a very ugly person though and was incredibly judgmental and downright mean to everyone. I felt like a parent schooling their child who points at people who are "different", teaching the child not to point or judge.
People never forget how you've made them feel.
Oh well. I say this from an extremely body positive standpoint, but they're both morbidly obese now. I've loved and dated obese people before so no judgement here, but I am smiling that these two extremely superficial and judgmental people are now having to experience the judgement they once passed on others. It is a sad world we live in that those prejudices exist, don't get me wrong. But I hope they both will think twice before ridiculing another person now that they've lived through being "different".