ㄆㄧㄊㄡˊㄙㄢˋㄈㄚˇpītóu‑sànfǎ

披头散发
pītóu‑sànfàㄆㄧ ㄊㄡˊ ㄙㄢˋ ㄈㄚˋ
  1. 頭髮蓬鬆散亂整理形容儀容

with dishevelled hair (idiom)​, with one's hair down