A category of what you are into: --덕
**덕 -- **anime nerd
겜덕 -- gamer (게임)
**밀덕 -- **army nerd (미리터리)
기덕 -- tech nerd (기기)
컴덕 -- computer nerd (컴퓨터)**
음덕** -- music obsessive (음악)
락덕 -- rock obsessive (락음악)**
버덕** -- bus timetable anorak (버스시간표)
입덕/탈덕하다 -- to start/stop being obsessed with a person
-덕질 (the state of being a nerd), e.g. 기덕질, being a tech nerd and doing tech nerd things
A specific thing you are into: -빠
닌빠 -- Nintendo nerd
반탄빠 -- BTS nerd
애플빠 -- Apple nerd
롤빠 -- LOL nerd
힙찔이 -- obnoxious hiphop nerd
앱등이 -- Apple fanboy
삼엽충 -- Samsung fanboy