Its recent usage is largely an allusion to the film from 2000. The title refers to a contest where members of a graduating high school class are pitted against

Its recent usage is largely an allusion to the film from 2000. The title refers to a contest where members of a graduating high school class are pitted against each other to the death. https://en.wikipedia.org/wiki/Battle_Royale_(film) https://en.wikipedia.org/wiki/Battle_Royale_(film)