爾虞我詐 (ji5 jyu4 ngo5 zaa3) — both sides play dirty; each trying to cheat the other; double-crossing each other in Cantonese
jiˏ₅爾jyuˎ₄虞ngoˏ₅我zaa˗₃詐简 尔虞我诈
Mandarin Pinyin: er3 yu2 wo3 zha4
Meaning of 爾虞我詐
nounboth sides play dirty; each trying to cheat the other; double-crossing each other
nounyou cunning and I dishonest