拆穿西洋鏡 [－－－－镜]

Jyutping caak3 cyun1 sai1 joeng4 geng3
Pinyin chāi chuān xī yáng jìng

Definitions (CC-CANTO)
  1. to expose one's lie
Definitions (粵典–words.hk)
  1. 動詞
    揭穿​騙局​、​把戲
    to break up a conspiracy; to uncover an organised fraud; literally: to uncover a kaleidoscope