Inedible as in anything that isn’t food (ranging from something that would be dangerous, like glass, poisonous plants, or uranium, to something that is safe to eat but unpleasant with no nutritional value, like cardboard.) Eating the thing will be safe and painless.
Im not sure that’d count, as while there are social and legal repercussions and a higher risk of a few diseases, human meat, billionaire or not, isnt inheritly toxic or such, and does contain nutritional value.
Just the spine, then? Not even the marrow, just the bones themselves
An inedible part of a billionaire like Kim Kardashian’s silicone butt cheeks ^___^