Being a swot. Being intelligent. Being tall (I wore flat shoes and stooped). Being flat-chested.
More seriously, being pregnant at thirteen, a rumour which swept the whole school, being mocked even by teachers who drew obscene chalk images of me on the blackboard and told me not to go into labour in their lesson. It sounds unbelievable, doesn't it? But I assure you, it's true. It's also a measure of my home life that I felt unable to say anything to my parents (awful father), but in hindsight I wish I'd told my mother.
Of course I wasn't pregnant. I was a naive, thirteen-year-old virgin. I bunked off after a while and barely attended for my last two years. I then went to university at 25, came out with a 1st Hons, MA with distinction and a PhD. It felt like the best revenge.