lie through your teeth

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

mentir descaradamente, mentir sin pudor

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.
Estaba mintiendo descaradamente cuando dijo que no sabía nada del dinero desaparecido.
You don't have to lie through your teeth to impress me.
No tienes que mentir descaradamente para impresionarme.