Hate to be that guy with the opposite problem.
But I am down 35 lbs/13 kg since March. I really don't want to lose more weight, but it seems that I can't find the time of day to eat enough food to gain weight. With how much exercise I get naturally, I have to eat like a 3,000 to 4,000 calorie diet in order to not lose weight.
I eat about 800 calories for lunch, and 1600 calories for dinner, and maybe a 400g snack. After dinner I am dead tired so I can't eat anymore. After all that I still lose weight.