a gorm - A full-of-gorm person is smart, but a gorm is someone who th

A full-of-gorm person is smart, but a gorm is someone who thinks they’re smart but they’re not

I’m full of gorm. My gormless brother tried to beat me at chess and lost twice.

My teacher is full of gorm. My friend is a gorm. He thinks he’s the teacher.

Full of gorm means you’re smart. Gorm means you’re a brain-dead twat.