司馬昭之心 [－马－－－]

Jyutping si1 maa5 ciu1 zi1 sam1
Pinyin sī mǎ zhāo zhī xīn

Definitions (CC-CANTO)
  1. it means everyone can see and know when people have evil and bad intentions and they are trying to hide that
Definitions (粵典–words.hk)
  1. x
Definitions (Wiktionary)
  1. phrase, idiomatic
    evil ambitions that are transparent to everyone