From what I've seen in other threads, means Add A Meal Week. After some weeks of sole sourcing, you add a meal for a week and then maybe go back to sole sourcing, or up the ladder with a 790 calorie diet (which is followed by a 1000 one, then 1200, and so on), depending on how much more you want to lose or how you're feeling with your diet. Not really sure, but something to do with keeping your metabolism in good shape... Probably a CD expert will read this and clarify further.