蛇都打到夫佬 [－－－－－－]

Jyutping se4 dou1 daa2 dou2 fu1 lou2
Pinyin shé dōu dǎ dào fū lǎo

Definitions (粵典–words.hk)
  1. 語句
    一件​事​完全​無​可能​、​唔​合理
    an expression meaning something is impossible, literally "straight can beat full house"