Plump Bulbous circulates mainly as a short, user-shared soundboard clip, without a widely documented origin in a film, show or viral video. That ambiguity is part of its appeal online, where creators reuse short, odd phrases precisely because they sound funny out of context. In edits, group chats and streams it functions as a low-effort in-joke, a way to mark something as comically round or exaggerated without explaining the reference. Because it is only about two seconds long, it fits easily into fast-paced content and keeps resurfacing whenever a new clip needs a quick, absurd reaction.