Cuphead is a 2017 run-and-gun game from Studio MDHR, famous for its hand-drawn animation inspired by 1930s cartoons and its punishing boss fights. When a boss is finally beaten, the game flashes a knockout screen, and that triumphant moment has become a favourite clip for editors and streamers. Shared widely on soundboards and in gaming videos, the clip is now used far beyond Cuphead itself, as a shorthand for any decisive win, comeback or dramatic finish.