lie through your teeth
US /laɪ θruː jʊər tiːθ/
UK /laɪ θruː jʊər tiːθ/

1.
撒謊, 公然撒謊
to tell someone something that you know is not true, often in a blatant or unashamed way
:
•
He was lying through his teeth when he said he didn't know anything about the missing money.
他說他不知道失蹤的錢的事情時,完全是在撒謊。
•
You don't have to lie through your teeth to impress me.
你不必撒謊來打動我。