不動聲色 (bat1 dung6 seng1 sik1) — to maintain one's composure; stay calm and collected; not turn a hair; not bat an eyelid in Cantonese
batˉ¹不dungˍ₆動sengˉ¹聲sikˉ¹色简 不动声色
Mandarin Pinyin: bu4 dong4 sheng1 se4
Meaning of 不動聲色
nounto maintain one's composure; stay calm and collected; not turn a hair; not bat an eyelid