Senpai is a Japanese term for an older or more experienced peer, and the phrase senpai notice me grew out of English-speaking anime fandom as a playful, exaggerated plea for recognition from someone admired. It spread through fan art, forum posts, short videos, and social media captions, where it became shorthand for unrequited admiration and hopeful fandom rather than a quote from one specific show. Creators still use it because the wording is instantly understood by anime audiences and works as a quick, self-aware joke about wanting attention.