Risada is the Portuguese word for laughter, and kakaka is a playful written form of that laugh that became common in Brazilian online chats, comments and meme pages, where repeated k sounds stand in for a loud cackle. Because the spelling is instantly recognisable to Portuguese-speaking viewers, short clips using it spread through social videos, reaction edits and soundboards as a shorthand for mocking laughter. It remains popular because it needs no translation to land, working as a quick audio cue that a moment is meant to be teased rather than taken seriously.