好眉好貌生沙蝨 [－－－－－－虱]

Jyutping hou2 mei4 hou2 maau6 saang1 saa1 sat1
Pinyin hǎo méi hǎo mào shēng shā shī

Definitions (CC-CANTO)
  1. to describe someone who looks like a talent, but in fact did not have any skill or ability
Definitions (粵典–words.hk)
  1. 語句
    一個​人​外貌​俊俏​但​係​內​裏​品格​卑劣
    (of a person) despicable albeit good-looking; all that glitters is not gold; literally: a person who has pretty face and eyebrows is infested with sand fleas
    • 呢個男人西裝骨骨，竟然喺地鐵度非禮女學生，真係好眉好貌生沙虱嘞。
      呢个男人西装骨骨，竟然喺地铁度非礼女学生，真系好眉好貌生沙虱嘞。
      ni1 go3 naam4 jan2 sai1 zong1 gwat1 gwat1, ging2 jin4 hai2 dei6 tit3 dou6 fei1 lai5 neoi5 hok6 saang1, zan1 hai6 hou2 mei4 hou2 maau6 saang1 saa1 sat1 laak3.
      This man, wearing a well-tailored suit, dressed decently, molested a schoolgirl on an MTR train; all that glitters is not gold.
  2. 近義詞
    金玉其外，敗絮其中
  3. 參看
    好眉好貌生沙虱
Definitions (Wiktionary)
  1. phrase, Cantonese
    Of a person, appearing to be talented, but in reality having no talent.