言不由中

Pinyin: yán bù yóu zhōng Explanation: 指心口不一致。同言不由衷”。 Source: 清·蒲松龄《聊斋志异·贾奉雉》实相告此言不由中，转瞬即去，便受夏楚，不能复忆之也。” Thesaurus:  Double heart, speak with one's tongue in one's cheek, like Lord Ye who claimed to be found of dragons but was mortally afraid of them