A person who lives for eating delicious food, like a serial killer he's always on the hunt and no good food it's safe with him around. Like a serial killer he choose his victims, so the serial eaters don't eat everything without criterion. They love yummy food and they're always hungry for that.
For example, there's a blog called "Italian Serial Eaters" where they embody this definition, infact they eat selected delicious food from all over the world.
You know, I always want delicious food, I'm a serial eater.