“Peko” is widely known as the sentence-ending verbal tic associated with Usada Pekora, a rabbit-themed Japanese virtual YouTuber who debuted in 2019. Fans clipped the distinctive expression from streams and reused it in short edits, reaction videos, animations, and gaming compilations. Its compact length and recognizable delivery helped it function as both a character reference and a standalone punchline. The sound remains useful because it communicates cuteness, playful confidence, and fandom recognition in less than a second, even without additional dialogue or context.