With no clear single source attached to the clip, nucular diarrhea has circulated mainly as a user-shared meme sound, passed between soundboards and short video edits because its wording is instantly memorable and easy to quote. The humour comes from the deliberate mispronunciation paired with a crude word, a combination that fits reaction edits, fail compilations and gross-out jokes without needing any context. That simplicity has kept it in rotation for creators who want a quick, absurd punchline.