The phrase comes from TikTok's Gen Alpha slang wave, where 'what the sigma' became a tongue-in-cheek reaction to anything odd, dramatic or trying too hard to look cool. Clips using the line spread through short-form edits, reaction videos and soundboards, with creators remixing the delivery for extra absurdity. Reversing the audio is a familiar meme trick: it keeps the joke recognisable while making it sound stranger and harder to place. That twist is why reversed versions keep circulating, especially in fast edits where a one-second surprise lands better than a full spoken line.