otaku, a Japanese term for people with obsessive interests such as anime, manga, and video games
see also 宅男[zhai2 nan2]
see also 宅女[zhai2 nu:3]
Definitions (粵典–words.hk)
名詞、外來語
源自日文おたく(御宅)，指沉醉於某個次文化嘅愛好者(動漫、打機、交通、軍武等)，愛好留響屋企自得其樂，以致欠缺人際網絡同其他常識 from Japanese "otaku" (home-stayer), people who deeply infatuated with a specific sub-culture (ACG, transport, military etc), and prefer to stay home enjoying them, causing short of social network and common sense