There is no widely documented origin for awawawawazzwzzw, and its appeal comes from that mystery rather than a famous scene or character. As a user-uploaded soundboard clip, it circulates as a piece of internet nonsense: easy to recognise by its spelling, hard to explain, and instantly usable as a joke on its own. Short, strange vocal sounds like this tend to survive because creators can reuse them in completely different contexts, from reaction videos to chat messages, without needing viewers to know any backstory. Its length also sets it apart, giving editors room to time a gag around it.