口是心非

口是心非 [kǒu shì xīn fēi]

1. ■ say yes and mean no; affirm with one's lips but deny in one's heart; be double-faced; consent outwardly but disagree inwardly; have two faces; outwardly agree but inwardly disagree; play a double game; carry fire in one hand and water in the other; say sth. with one's tongue in one's cheek; cry with eye and laugh with another; say one thing and mean another; the mouth specious and the mind perverse; Though one speaks well, one's heart is false.