A short phone filmed reaction clip, the audio spread online as a standalone laugh track detached from the original person being filmed. Creators began laying it over new photos and videos, so the target changes every time while the disbelieving laugh stays the same. That flexibility kept it alive beyond its first viral posts, through meme pages, group chats and short form video, where it now works as a quick signal that something looks absurd without needing any explanation or setup from the creator posting it.
About this sound
The look at this dude sound effect features a man laughing hard at someone off camera, used in memes to mock a ridiculous outfit, haircut or fail moment.
A man tries to get the words out through his own laughter, repeating look at this dude as if the sight in front of him is too much to describe. His voice cracks, pauses and dissolves into wheezing giggles, which is exactly what makes the clip land. The joke is not really the person being filmed, it is the helpless reaction, the feeling of seeing something so odd, badly dressed or badly timed that all you can do is point, laugh and make everyone else look at it too.