Albert Barnes Commentary Proverbs 6:12

"A worthless person, a man of iniquity, Is he that walketh with a perverse mouth;" — Proverbs 6:12 (ASV)

A naughty person - literally, “a man of Belial,” that is, a worthless man (see the Deuteronomy 13:13 note). This is the portrait of the man who is not to be trusted, whose look and gestures warn against him all who can observe. His speech is tortuous and crafty; his wink tells the accomplice that the victim is already snared; his gestures with foot and hand are half in deceit, and half in mockery.