Andrej Karpathy floated the phrase "vibe coding" in a post on X — his name for a way of building software where you give in to the vibes, forget the code exists, and accept the AI's suggestions without reading the diffs. The post drew millions of views, and the phrase spread rapidly, putting a name to a style of development already taking hold. In November, Collins Dictionary named it the 2025 word of the year. Japanese adopted "バイブコーディング" as-is, with explainers followed by articles questioning the quality and security of the resulting code.