Black diarrhea from internal bleeding is really black. It is not brownish or blackish. The consistency of black diarrhea from internal bleeding is like that of actual tar, the dark thick flammable liquid used in road making.
Ghosting (identity theft), a form of identity theft, whereby a person takes on the identity of a deceased person. Ghosting (incarceration), repeatedly moving a prisoner through different institutions to avoid scrutiny, or because the prisoner has become unmanageable.
Ghost, specter, spirit all refer to the disembodied soul of a person. A ghost is the soul or spirit of a deceased person, which appears or otherwise makes its presence known to the living: the ghost of a drowned child. A specter is a ghost or apparition of more or less weird, unearthly, or terrifying aspect: a frightening specter. Spirit is often interchangeable with ghost but may mean a supernatural being, usually with an indication of good or malign intent toward human beings: the spirit of a friend; an evil spirit.