嘴硬心軟 [－－－软]

Jyutping zeoi2 ngaang6 sam1 jyun5
Pinyin zuǐ yìng xīn ruǎn

Definitions (CC-CEDICT)
  1. see 刀子嘴，豆腐心[dao1 zi5 zui3 , dou4 fu5 xin1]
Definitions (Wiktionary)
  1. phrase, idiomatic
    to have a foul mouth hiding a soft heart