We had a science teacher called Mr Lowcock. He was ginger, so was nicknamed copper b*ll*cks
There was a boy in my year who had hydrocephalus and had a massive head. As some boys do, we gave him the nickname of Brains (because he looked like Brains off Thunderbirds and had the same glasses). I wish I could meet him again to say sorry.
Weirdly my mate called James always went by Owen. No reason, he just liked the name.
My other mate was called Rabbit because he had slightly larger than average teeth