Correct

心口不一

/ xīnkǒu bùyī /
Strokes

Definition

heart and mouth at variance (idiom); keeping one's real intentions to oneself/saying one thing but meaning sth different

Example

Definition

say one thing and mean another; not say what comes to one's mind; say sth different from what one thinks; speak with (one's) tongue in (one's) cheek

1
Yào
dāngxīn
当心
  
,
zhè
rén
xīnkǒu
心口不一
  

Beware of him. He is two-faced.