Charles Ellicott Commentary Psalms 140:11

"An evil speaker shall not be established in the earth: Evil shall hunt the violent man to overthrow him." — Psalms 140:11 (ASV)

An evil speaker. —This literally means, as in the Septuagint and Vulgate, a man of tongue; (Job 11:2). Margin: "man of lips." It is hardly possible to resist the suggestion that some particular person, noted for the loudness or violence of his speech, was intended.

Evil shall hunt... —Compare to Proverbs 13:21 and Horace, Odes iii. 2, Conington’s translation:

"Though vengeance halt, she seldom leaves
The wretch whose flying step she hounds."

To overthrow. —The Hebrew is a noun, formed from a root meaning "to thrust," and literally means either to destruction or with hasty pursuit. Some render "with successive thrusts;" but this is hardly a hunting figure.