好眉好貎生沙虱 [－－－猊－－－]

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

Definitions (CC-CANTO)

to be good looking on the exterior but is infact a bad person in character [colloquial]