It mainly gets converted to fat and sugar. Stored as fat and glycogen with the aid of water.
An interesting fact is that poo isn't really made of food (to the most part). There is some food there which is food that the body didn't properly process. Poo is a combination of water and bacteria (dead and alive), waste products from the body (old fats, salts, mucus, cellular linings), and a little bit of wasted food. Most of the food you take in is stored or processed for energy and the waste is converted to carbon dioxide and breathed out.
But as far as the bodily waste products go.... they become poo and they come out my poo hole.