光棍佬教仔 [－－－－－]

Jyutping gwong1 gwan3 lou2 gaau3 zai2
Pinyin guāng gùn lǎo jiào zǎi

Definitions (粵典–words.hk)
  1. 語句
    歇​後​語​嘅​前​句​，​後​句​係​「​便宜​莫​貪​」
    the preceding part of a "Sandwich pun", literally "tricksters teach sons"; its second part is "if you are offered huge returns or instant profits, don't be greedy."

光棍佬教仔 [－－－－－]

Jyutping gwong1 gwan3 lou2 gaau3 zai2
Pinyin guāng gun lǎo jiào zǐ

Definitions (CC-CANTO)
  1. one not to be greedy