This sound circulates as a short, user-uploaded soundboard clip centred on Nathan M and his exaggerated sniff, with the tag upyobum hinting at the joke behind it. Rather than coming from a widely known film or television scene, it has found its audience through meme edits and reaction videos, where a single over-the-top sniff can carry a whole gag. Its appeal is in its specificity: listeners recognise Nathan's sniff as a ready-made reaction, so creators keep reusing it for suspicious, nosy or judgemental moments.