lie through one's teeth

One, the girl is lying through her teeth for reasons yet to be determined.

He was lying through his teeth, of course, but other people had forced him to do that.

"If anyone tells you that what happened doesn't have any effect, they are lying through their teeth."

And yet here she was in a small room with three people who were all lying through their teeth.

So they could have lied through their teeth about what was in it, to put your mind at rest.

Yet, for months, she'd looked him straight in the eyes and lied through her beautiful white teeth about something or another.

The man had a hell of a memory or was lying through his teeth.

Lying through my teeth, actually, but what else could I say?

Of course he could have been lying through his teeth about the whole thing.

"Good, because they would have been lying through their teeth."