The noun form is "skeletor". A skeletor typically spends his entire day watching TV from a couch while wearing sunglasses. He will move only to vomit.
"I want to shit, but I know if I do, I'll throw up."
"John, you went skeletal dude."
~Two guys at party~
"Im on my sixth shot and we've only been here a half hour."
"Sam, you're gonna be goin skeletal by midnight."