若无其事 (ruò wú qí shì) | Meaning: (idiom) as if nothing had happened; calm and composed; nonchalant | Chinese Idiom with Pinyin & Origin

not a word or movement (idiom); remaining calm and collected · not batting an eyelid不动声色bù dòng shēng sè

cool and collected (idiom); showing no sign of nerves · perfectly composed泰然自若tài rán zì ruò

calm · cool镇静zhèn jìng

not in the least concerned (idiom) · reckless · couldn't give a damn about it · unperturbed · couldn't care less · harum scarum满不在乎mǎn bù zài hu

(idiom) as if nothing had happened; calm and composed; nonchalant