|Noah Webster's Dictionary|
(n.) Secret slander; detraction.
Backbiting (2 Occurrences)
Psalms 35:16 Like the profane mockers in feasts, They gnashed upon me with their teeth. (See JPS)
Proverbs 25:23 The north wind brings forth rain: so a backbiting tongue brings an angry face. (WEB KJV JPS ASV DBY WBS NAS RSV)