He had the effrontery to say I was lying.

他竟敢说我撒谎。

How can he have had the effrontery to say “Piss off!” to you?

他怎么会样无，竟然对你“滚开！”？

This is a despicable fraud. Just imagine that he has the effrontery to say it.

一个可的骗局。他竟然有脸说样的话。