Guayando comes from Spanish slang for grinding or grating, and in online clips it is linked to dancing and perreo style movement played for laughs. The XDD part is the classic text laugh, similar to XD, signalling that the moment is not serious. Short versions began circulating on user soundboards and in meme edits where a two second audio cue is enough to label a scene. It stays popular because the word alone explains the action, so creators can add instant context to dances, fails and reaction jokes without any setup or dialogue needed beforehand.