It's called the Norwalk Virus. Acquire that, & you, too, shall lose 4 pounds in two days.
Of course, when you start eating again, you will probably gain it back, but hey...imagine how good you will look for a few days! *rolls eyes*
Yep...after 3 days with this nasty ass virus, I am down to 119. Sheesh, I haven't seen this weight for years!!!!!