Khwaay is the Thai word for a water buffalo, and in everyday Thai slang it is also used as a blunt insult roughly similar to calling someone an idiot. That double meaning is why the clip travels well as a reaction sound, even for viewers who do not speak Thai, because the stretched shout clearly sounds like a mocking call-out. Short versions circulate on meme soundboards and in edited videos, where the single word is reused for fails, embarrassment and friendly teasing rather than tied to one specific scene or character.