ˇˊㄨㄛˇㄓㄚˋěryú‑wǒzhà

尔虞我诈
  1. 互相猜疑欺騙爾詐我虞」。 鉤心鬥角爾虞我詐現象才能消除?」。

lit. you hoodwink me and I cheat you (idiom)​; fig. mutual deception, each tries to outwit the other, dog eats dog and devil take the hindmost