I was the nerd in my class and I was bullied at primary school in Poland in 90s, but that's because I had lots of pretty obvious sicknesses (asthma, skin allergies, half the time I was going to school with my arms bandaged, I wasn't participating in sports, etc.).

Being good at everything was actually cooler than being bad, especially if you were pretending you're naturally smart and didn't have to work to achieve that. I never understood how come kids in American TV are bullied for being smarter than the others, usually being smart is an advantage. On the other hand if you worked hard for grades or (even worse) were a favorite of some teacher and sucked up to her - you were a "kujon" and that was very uncool.

So everybody pretended they are brilliant and never study for even 10 minutes just know everything :)