An ungodly witness scorneth judgment: and the mouth of the wicked devoureth iniquity.
An ungodly witness (Hebrew, a witness of Belial) scorneth judgment - justice. He has no reverence for the sacred place of justice, but makes it a jest.
And the mouth of the wicked devoureth iniquity - greedily and with delight, filling themselves, wholly with it: 'drinking iniquity like water' (Job 15:16).