방약무인in English:acting as if one is in a private space in public, disregarding the impression on others

Examples
with 방약무인.

• 그는 방약무인으로 행동하며 주변 사람들을 신경 쓰지 않았다.geuneun bangyakmuin-euro haengdonghamyeo jubyeon saramdeul-eul sin-gyeong sseuji anhaetda.He acted as if he were in his private living room, not caring about the people around him.