Buá is a common Portuguese-language onomatopoeia for crying, often written to mimic a loud, childlike sob. As a short audio meme, this type of clip circulates widely in messaging app audios, meme edits and reaction videos, where a single exaggerated cry can say more than dialogue. Its appeal comes from instant recognition: listeners hear fake sadness without needing context. Because it is under two seconds long, editors use it as a punchline accent rather than a full scene, keeping it popular for quick jokes about disappointment and playful drama.