The phrase comes from the wider sigma meme that spread across TikTok, YouTube Shorts and Discord servers in the early 2020s, where sigma described a lone, confident character who does not seek approval. Short voice lines praising a moment as sigma became a reusable reaction format, often paired with edits, slow zooms and the rizz sound effect for similar Gen Alpha slang jokes. Its appeal is brevity, letting creators label a win, comeback or confident pose without explaining the joke in their own voiceover.