Miyenne and I are twin sisters, so her story is as much mine.
In elementary school, I was bullied for my weight gain and various other things - including being really smart. I don't remember much (I don't really remember my childhood, for reasons), but do know I was picked on quite a bit. I wouldn't be invited to parites, or I'd be invited to someone's house and they literally wouldn't open the door for me, or if they did elt me in, they'd say hi, then walk out the door and go to someone else's house leaving me to either go home or follow them and be ignored all day.
I joined a softball team in second grade. It went okay for a couple years, then we started putting on weight and I started getting picked on for it, even if I was still a better player than a lot of them. I wouldn't be picked as a partner and the coaches would have to team up with me, girls refused to play with me all the time. It got to the point in my teens that the coaches (who were the parents of girls) would refuse to put me on their teams because their daughters didn't think I was cool enough they'd be embarrased in front of the boys who came to watch. Yes, even parents bullied us. I quit at 17 because I couldn't stand the shit talk from the girls anymore.
(I'll add an aside on the weight gain just as Miyenne did - we were very active kids. We walked to school daily, rode our bikes everywhere else, I played basketball and softball... this was all before it was normal for people to have computers in their house, so kids really did live outside. Just... a about 7/8, we started gaining weight and didn't really stop until we were about 20. We've been pretty stable since then, but weight loss just doesn't happen either, even if we try hard. And no, no diagnoses on any health issues, either.)
Middle school was pretty terrible. The friends I'd had in elementary school literally dumped me on day one because I wasn't cool enough for them. As is the way of girls, I had a huge crush on one guy and he knew it... because Miyenne's "best friend" literally burst into the classroom one day, jumped up onto the desk and started yelling it out loud. She then left and walked into the next room to do the same and so on. ... Lots of girl drama, being snubbed and picked on all the time, spit on, even pushing/shoving that tuned into thrown punches. One guy pretend-dated me for a few weeks, being a collasal jackass and going around telling people we were dating and laughing about it. He then 'broke up' with me in the middle of class one day infront of everyone. I was a very naieve girl, but I just "uh-huh'd" my way through that.
High school was hard, too. I had more friends and had people to eat lunch with, but as Miyenne said, it was a large group and some people picked on us and others just let it happen. I was still kind of disliked by most people, but it was better with a few people who I knew I could go stand around and talk with and not be harrased by. Thinking back, a few of them were just good people, and that was rare.
After high school, I changed and became a completley different person because I could. I'm a lot more loud and outspoken and don't take shit anymore. I am also pretty damn good looking, if also overweight. I also have a great career and am pretty happy. But I still hate so very, very many people and wish them terrible, horrible, painful lives.