聞風喪膽 [闻风丧胆]

Jyutping man4 fung1 song3 daam2
Pinyin wén fēng sàng dǎn

Definitions (CC-CEDICT)
  1. hear the wind and lose gall (idiom); terror-stricken at the news
Definitions (粵典–words.hk)
  1. 語句
    聽到​風聲​、​消息​就​已​經嚇​破膽
    to become terror-stricken at the news; to be very scared
Definitions (Wiktionary)
  1. phrase, idiomatic
    to be extremely terrified of a certain person, group or thing