A source of ammo in a movie that never runs out; a weapon that never is seen, or appear to need, to be reloaded. Initially called an “infinite clip,” the name was changed because one can, according to some sources, find free pornography by Googling “infinite clips.” An endless clip can run out if there’s a plot point that requires a weapon to run out of ammo.

This example from Inglorious Bastards shows all combatants having endless clips—in fact, our heroes don’t even bother to carry any ammo with them during the film. Note that at one point a character does run out of ammo because it might look cool if he hit a German with his unloaded machine gun. Many like to cite Where Eagles Dare; however, in that film, people carry extra clips and are sometimes pictured reloading. See also Von Ryan’s Express.