The condition known as lipoatrophy where individuals taking drugs (protease inhibitors and anti-retrovirals) for the treatment of HIV and/or AIDS loose fat from the face and body. Sometimes the fat is redistributed to the abdomen area causing sufferers to do a lot of ab workouts like crunches, etc. The result can cause said individuals to look very much like world class athletes.
Conversation overheard at the gym:
Guy 1: "Have you noticed how cut Charles Johnson has gotten? He works out all the time and looks really lean. He must only eat lean meat and salad."
Guy 2: "He eats a lot of meat alright but not the kind you're talking about. Haven't you heard? Miss Thang be on the AIDS diet!"