In "Mad Max: Fury Road," the term "Valhalla" is used by the War Boys to represent a glorious afterlife. They believe that dying in battle while serving Immortan Joe will earn them entry into Valhalla, where they will be honored as heroes. This belief in Valhalla is part of the cult-like ideology that Immortan Joe instills in the War Boys, driving them to perform extreme acts of bravery and sacrifice.