<p>Chewing and spitting large quantities of food is an eating disorder (EDNOS) according to the DSM. As someone who has been struggling with this for nearly 2 years, I'm rather surprised to see the flippant replies. One of the major risks of this behavior is ulcers. When I first started, I thought it was something I could do occasionally as needed. Like any other eating disorder, however, it spirals out of control. My advice is to stop now while you can.</p> One more thing, digestion starts the minute you put food in your mouth. You cannot spit out every bit of food, so when you start to gain weight and can't think of a reason why, remember it's because you were cheating.