from The American Heritage® Dictionary of the English Language, 4th Edition
- transitive v. To speak spitefully or slanderously about (another).
- intransitive v. To speak spitefully or slanderously about a person.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. To make spiteful slanderous or defamatory statements about someone.
- v. To attack from behind or when out of earshot.
- v. To speak badly of an absent individual.
- n. One who engages in backbiting; a backbiter.
from the GNU version of the Collaborative International Dictionary of English
- transitive v. To wound by clandestine detraction; to censure meanly or spitefully (an absent person); to slander or speak evil of (one absent).
- intransitive v. To censure or revile the absent.
from The Century Dictionary and Cyclopedia
- To injure morally in a manner comparable to biting from behind; attack the character or reputation of secretly; censure, slander, or speak evil of in absence: rarely with a thing as object.
- To slander or speak evil of the absent.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- v. say mean things
From Middle English bakbiten, bacbiten, equivalent to back + bite. Cognate with Icelandic bakbíta ("to backbite, vilify"). (Wiktionary)