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.
Keying could refer to keying a car. This is a form of vandalism where someone takes the sharp edge of the key and scratches into a car leaving a dent in the paint. It can also be referring to computer graphics. This is when you combine two full frame images together.