dump truck

noun2

1. •
   A heavy truck, for carrying loose, bulk cargo (e.g., soil, gravel, grain), having a hinged bed that allows the contents to be unloaded onto the ground via dumping.

   • Specialised long-reach excavators with a clamshell grab then reach though the openings to lift the spoil to the surface, which is then deposited in articulated dump trucks (ADTs). — 2023
2. •
   (slang) A large pair of buttocks.