Wiktionary
dump job
n. 1 A corpse moved from the place of death to a place intended to obscure circumstances of the death. 2 The abandonment of an unfinished task for which the abandoner might be expected to take responsibility, especially in a fashion that makes it likely that one or more colleagues will take on its completion. 3 A dump truck.
Wikipedia
Dump job
In police work, a dump job is a type of murder in which the victim's body is transported to another location and abandoned, usually in a deserted area.
The intent of a dump job is to hide someone's association with the murder. This may be direct responsibility for the killing or involvement in surrounding circumstances.
Such cases often entail forensic difficulties.