BACKBITE

v. slander one who is not present, gossip, disparage, libel

Verb
1. say mean things
(synonym) bitch
(hypernym) complain, kick, plain, sound off, quetch, kvetch
(derivation) defamer, maligner, slanderer, vilifier, libeler, backbiter, traducer

(v. i.)
To wound by clandestine detraction; to censure meanly or spitefully (an absent person); to slander or speak evil of (one absent).
  

(v. i.)
To censure or revile the absent.
  

In Ps. 15:3, the rendering of a word which means to run about tattling, calumniating; in Prov. 25:23, secret talebearing or slandering; in Rom. 1:30 and 2 Cor. 12:20, evil-speaking, maliciously defaming the absent.

v. a.
پيٹھ پيچھے براکہنا, بدگوئي يا نندا کرنا ,چغلي کھانا , غيبت کرنا, بگونا