Scaphism (aka The Boats)

Professor Foxtrot tells her students about the horrific Persian execution method known as the Boats; also known as Scaphism. In which the victim would be force-fed and covered in milk and honey, which would results in massive diarrhea, then tied to a boat, where he would lie for days while insects covered, ate and mated in his flesh and feces. This would go on for days and week, until the victim finally died of septic shock.

Example of:
Cruel and Unusual Death