ghoul

noun

Etymology: Borrowed from French goule, from Persian غول (ġul) from Arabic غُول (ḡūl).

1. A demon said to feed on corpses.

   “The other chamber had shown a pack of ghouls and witches over-running the world of our forefathers, but this one brought the horror right into our own daily life!.”

   “From my laboratory in the Castle east To the master bedroom, where the vampires feast The ghouls all came from their humble abodes To get a jolt from my electrodes They did the Mash They did the Monster Mash.”

2. A graverobber.

   “We would not say that under no circumstances ought a grave to be opened; but it ought to be opened like a grave and not like a burglar-proof safe. […] And some of us enter it, if not without knocking, certainly without taking our hats off. We should not so much mind these eminent persons being ghouls, if only they were modest and apologetic ghouls.”

   “Police went to the cemetery at Trafalgar, near Yallourn, and discovered that a woman's body had been stolen from a grave. They were satisfied it was the same body found at Yallourn - but made no progress in running down the ghouls responsible for the outrage.”

3. A person with an undue interest in death and corpses, or more generally in things that are revolting and repulsive.
4. A person with a callous or uncaring attitude to human life and suffering, particularly when prioritizing economic concerns.

   “Restored to bumptiousness, Peter arrived jauntily in the kitchen, to survey Mrs Dibble's body as a spectacle new to him, and remark, "So the old trout's done herself in properly this time, I'm told. About time she did, the way she's been going on here." "Shut up, you old ghoul, and help Dr Grimsby to carry her upstairs."”