It is amazing how my bible readings on a daily basis seem to be so relevant. Before we helplessly lash out at liars, follow this advice: call to the Lord! He will answer you and deal with the deceitful tongue, the lying lips, in his way, in his time.

Psalm 120:1-4
In my distress I called to the Lord,
and he answered me.
Deliver me, O Lord,
from lying lips,
from a deceitful tongue.
What shall be given to you,
and what more shall be done to you,
you deceitful tongue?
A warrior's sharp arrows,
with glowing coals of the broom tree!

Bible Gateway link