The line comes from Yu-Gi-Oh, the anime built around the Duel Monsters card game, where Seto Kaiba is the wealthy, proud rival duelist who rarely praises anyone. Good move is the kind of brief, grudging acknowledgement he gives when an opponent outplays him, which is why fans remember it as a rare moment of respect from an otherwise arrogant character. Clips of the line have since circulated in Yu-Gi-Oh edits, card-game videos, and gaming memes, where it is used to mark a clever play, a comeback, or a rival finally earning recognition.