This kind of gulp sound is widely used online as a simple reaction effect rather than being tied to one clearly documented source. Short swallowing noises like this became common in meme edits, soundboards and reaction videos because they instantly communicate anxiety, tension or craving without needing dialogue. It remains popular because the joke is easy to understand in almost any context, from awkward social clips to dramatic reveal edits. Creators often pair it with exaggerated pauses, zooms and other goofy ahh sounds for extra comedic timing.