고양이 쥐 사정 보듯 A cat showing regard to a mouse. Would a cat ever have reason to show high regard to a mouse? Hardly. This expression decribes someone surpressing their deepest most urge to cause harm to another. (고양이가 쥐의 사정을 볼 리가 있겠는가? 속으로는 해칠 마음을 먹고 겉).

[edit] English expressions

• To be a wolf in sheep´s clothing
• To play the hypocrite

[edit] Similar expressions

• 고양이 쥐 생각하네