Chipmunk-style voices have long been a shortcut for cartoon silliness online, because pitching a voice up instantly makes it sound playful and harmless. This particular weeeee works in the same way, with no specific film, show or celebrity attached to it, which is why creators can drop it into almost any funny clip without needing context. It circulates on soundboards and in short-form edits, where its brevity is an advantage, and it remains popular because it instantly signals fun, speed and a lack of seriousness in just over a second.