What is Body Snatching?

Legal Definition
Body snatching is the secret disinterment of corpses from graveyards or other burial sites. A common purpose of body snatching, especially in the 19th century, was to sell the corpses for dissection or anatomy lectures in medical schools. Those who practiced body snatching were often called "resurrectionists" or "resurrection-men". A related act is grave robbery, uncovering a tomb or crypt to steal artifacts or personal effects rather than corpses.
-- Wikipedia