"Geek" is "범생이"(pŏm-saeng-i) in Korean.
The person who keeps on studying. Good study student is called as 우등생 (U deung sang, honor student), but says, is to study can be but the other cannot be much, it looks immediately seen a student at Toka wears glasses a little perverse in term 범생이 (Beom sang e). Words that do not want to be told not mean very good. There is a "공부 벌레 (study of insects)" to similar representation.