This sound is a generic dry cough effect rather than a quote tied to a specific character or meme source. Short cough clips like this have been widely used in online edits, prank audio, animation dubs and reaction videos for years because they instantly suggest discomfort, sickness or social awkwardness. Its staying power comes from how simple and flexible it is: the sound is recognizable in under a second and works in both realistic scenes and exaggerated comedic timing.