Fat Joe has fueled his rap feud with 50 Cent, by dubbing the superstar hip-hopper a coward. The bickering pair's rift deepened when 50 - real name Curtis Jackson - dubbed him "Fat Boy" and "Joey Crack" and rapped about leaving Joe's "brains on the floor" in the track I'm Leaving.

But Joe - real name Joseph Antonio Cartagena - isn't worried, claiming 50 Cent never follows through with his threats, pointing at his failure to take on another longtime rival Ja Rule.

He tells Complex.com, "He's got shot at by people who he knows who they are, and he doesn't do nothing about it. He sees Ja Rule, little Ja Rule and he never even fought him one on one. And he's going to come f--- with Fat Joe? Are you serious? He still don't leave his house?"

(This news article provided by World Entertainment News Network)