What do you call a person who bake all the time?
A baker or chef.
A person that eats all the time is called greedy. If you know a person that eats all the time, it's likely they will get fat. If they don't get fat and they eat all the time, then that is just the way they were born. edit- greed is where you want and keep everything for yourself where as if you eat a lot you would be called a glutton