One of those "You can't hurt me..." idiots, with a smooth spherical ginger head and terrible teeth, "Pumpkin" already had enough reasons to be bullied.
Then his family got involved.
After school one day Pumpkin was about to get into his mummy's car when he was tripped by a boy half his age. "Ha-ha! PUMP-KIN!" laughed most people alive at the time.
Indignant, his mother burst out of the car, stuck her chest out and declared: "Yeah? Well I'm MRS Pumpkin!"

Pumpkin's look of "Fucks sake, Mum" coupled with the realisation of where Pumpkin's, well, pumpkin-ness came from, made for at least a term's worth of impressions and some great halloween costumes.