1) He is the person who backbites.

2) A lot of backbiting goes on in our office.

3) All this backbiting is destroying company morale.

4) He was tired of all the backbiting and gossip in the office.

5) What they have done, however, is turn the sleepy municipal bond industry into a caldron of backbiting and finger-pointing.

6) A feral world of backbiting malice, veiled threats, liars and blackmailers.

7) I do not enjoy pulling rank, but I do not tolerate unmanly gossip and back-biting.

8) He who blames one to his face is a hero, but he who backbites is a coward. 

9) His classmate do not enjoy his company because he always backbite others.