What's WMS?

Right now I'm 152lb, 5'10" and probably around 13%bf. I'm real light for how I look, which is odd.. I lost all muscle due to an accident over the summer and at my lowest point only weighed 136. Right now I'm trying to just make it through campus food with half a measure of success...
I eat a bowl of oatmeal in the morning with some protein supplement, usually go to class after that then work out immediately after (400-600cal workouts, long intense stuff), I'll have a can of tuna on a slice of bread afterwards, maybe a little more protein, and some peanut butter or nuts or other healthy fats. After that it's kind of a toss up, just try to eat whatever decent stuff I can scrounge up in the food court, I eat 5-6 meals per day. End up eating a lot of salad with a few crutons as well, put some turkey on it or something. Campus food is frustrating!