No widely documented source, film, show or creator has been attached to Nijagggggg, and it circulates mainly as a short user-uploaded clip on soundboard pages rather than as a quotation from a known work. That lack of a fixed origin has not stopped it from being reused in the same way as other nonsense vocal memes, where the humour comes from the sound itself rather than a recognisable reference. Its nine-second length and stretched delivery make it easy to drop into edits, and its appeal rests on sounding spontaneous, silly and instantly repeatable.