Minecraft villagers have made their distinctive humming noises since the game's early village updates, and clips of those grunts have circulated for years as shorthand for trading, bargaining and deadpan NPC humour. The sigma label comes from later internet slang for a lone, self-assured character type, popularised in TikTok edits and meme compilations that pair serious music or captions with unlikely subjects. Combining the two turns a familiar game sound into an ironic status joke, which is why short creators keep reusing it for edits, gaming highlights and reaction videos.