Knulljud appears as a user-generated entry on meme soundboards, where short clips circulate without a clearly documented original source. Its short length and instantly recognisable delivery have helped it travel through edits, reaction videos and streams, even though its exact origin remains unclear from the available listing information. Rather than belonging to a single show, film or viral moment that can be verified, it functions as a reusable joke cue that creators recognise by sound alone. That flexibility is part of why it continues to appear in new edits long after its first uploads.