which will neither fatten them nor satisfy them.

Which will neither fatten nor avail against hunger.

You'll fatten up if you eat that much.

So I'm obviously going to need fatten him up.

If you include not just the food that ends up in shops and restaurants, but also the food that people feed to livestock, the maize, the soy, the wheat, that humans could eat but choose to fatten livestock instead to produce increasing amounts of meat and dairy products, what you find is that most rich countries have between three and four times the amount of food that their population needs to feed itself.