黃皮樹了哥——唔熟唔食 [黄－树－－－－－－－－]

Jyutping wong4 pei4 syu6 liu5 go1 — — m4 suk6 m4 sik6
Pinyin huáng pí shù le gē —— wú shú wú shí

Definitions (Wiktionary)
  1. phrase, Cantonese, idiomatic
    to take advantage of people one is closely acquainted with