Rampage Jackson is putting an end to rumors he's headed to an MMA fight with 50 Cent -- telling TMZ Sports there's no way in hell Fiddy ever REALLY gets in a cage with him.
50 started trash talking Rampage earlier this month -- saying he's the superior "Jackson" and would wreck the former UFC champ if they ever stepped in a cage.
The rapper fueled speculation that the two were working on a deal when he posted a photo with Bellator president Scott Coker.