Someone who learns when not necessary.
Puja is a nerd because she learns for a not-counting chemistry test.
a nerd would be someone that is into all things STEM sci fi fantasy and comic book media along with retro gaming, retro computing, computers and math, science that often gets bullied a lot
boy that nerd is so smart that he could even be like bill gates with his knack for computing
Someone who thinks they are smart but their 100% retard as they study 10x more to get the same grades.