lie through your teeth

US /laɪ θruː jʊər tiːθ/
UK /laɪ θruː jʊər tiːθ/
"lie through your teeth" picture
1.

真っ赤な嘘をつく, 平気で嘘をつく

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.
彼はお金がなくなったことについて何も知らないと言ったとき、真っ赤な嘘をついていた
You don't have to lie through your teeth to impress me.
私を感動させるために真っ赤な嘘をつく必要はない。