A moose bumper is a large, heavy-duty bumper that is attached to the front of a vehicle, typically a truck or SUV. Moose bumpers are designed to protect the vehicle and its occupants from damage in the event of a collision with a moose. Moose are large animals, and their bodies can cause significant damage to vehicles and people if they are hit by one. A moose bumper provides an extra layer of protection against this type of accident.