The phrase translates as a rude way of asking who someone is, and that bluntness is why it travelled as a reaction clip on video and soundboard sites. Spanish-speaking creators use it to answer strangers, rivals and unexpected intruders, while viewers who do not speak Spanish recognise the aggressive tone and confrontational rhythm. Its short length makes it easy to drop into edits without breaking the pace, and because the insult is aimed at an unnamed person, it can fit any argument, roast or surprise entrance. That flexibility has kept it in use long after its uploads.