non·cha·lant·ly
adverb/ˈnɒnʃələntli/
/ˌnɑːnʃəˈlɑːntli/
- in a calm and relaxed way, showing no sign of worry
毫不客气地：以一种平静和轻松的方式，随随便便就没有担心迹象的代名词（1） - He was leaning nonchalantly against the wall.
他漫不经心地斜倚着墙。 - ‘I already know,’ she replied nonchalantly.
“我已经知道了。”她漫不经心地回答。
- He was leaning nonchalantly against the wall.