Although I plenty respect your opinion Tangent, I respect Triv's more. So I'm gonna just name the thing. Lets see... fills you up, but you don't know it. The unknowning part brings the word "ninja" to mind, but that would be stupid. Hm...
Although Tangent, your thing about the exploding gives me an idea. If the same stuff still happens to your body and you don't stop eating and eventually die from blood clots or some other food-related death, I have an idea or two for a name.
Death by Food
Comida Muerte (Death Food)
Food Assassin
Those are the three I can think up of right now. Pick one you like Triv if any.