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

1.
뻔뻔하게 거짓말하다, 새빨간 거짓말을 하다
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.
그는 사라진 돈에 대해 아무것도 모른다고 말했을 때 뻔뻔하게 거짓말을 하고 있었다.
•
You don't have to lie through your teeth to impress me.
나에게 깊은 인상을 주기 위해 뻔뻔하게 거짓말할 필요 없어.