十賭九輸 [－赌－输]

Jyutping sap6 dou2 gau2 syu1
Pinyin shí dǔ jiǔ shū

Definitions (粵典–words.hk)
  1. x
Definitions (Wiktionary)
  1. phrase, figuratively, idiomatic
    gambling is a scam

十賭九輸 [－赌－输]

Jyutping
Pinyin shí dǔ jiǔ shū

Definitions (CC-CEDICT)
  1. lit. in gambling, nine times out of ten you lose (idiom)
  2. fig. gambling is a mug's game