Hollywood ammo is a term referring to guns/clips which have unlimited ammunition. The term came about from movies in which actors can shoot a seemingly infinite amount of bullets without needing to reload their gun.
Guy: Whoa! John Wayne just fired off 10 shots from his 6-shooter without reloading! Flub!
Girl: No, it's cool. He has Hollywood ammunition. He'll never run out of rounds.
Girl: No, it's cool. He has Hollywood ammunition. He'll never run out of rounds.
by 403forbidden January 17, 2011