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.
A ghost is the disembodied spirit of a once-living wizard or witch. Only magical beings can become ghosts. Many ghosts take up residence within Hogwarts Castle. These fleshless spirits were either afraid of death or have some extraordinarily strong connection to the locations they haunt.