To starve bodily, not by lack of food, but from lack of proper nutrition. You see, to smarve you must eat only human fecal matter for a prolonged period of time. Slowly your body stops functioning despite you eating to dispell your hunger when it strikes by dining on...well, shit.
"If I don't stop eating only shit, I'm going to smarve to death."
"I'm smarving and my skin looks ashen...I should eat a sandwich."