The phrase is everyday German slang, with 'Alter' used informally like dude or mate rather than its literal meaning of age. The clip circulates as a standalone reaction sound taken from a casual recorded video, and its appeal comes from how instantly recognisable the annoyed delivery is. Shared in chats and short edits, it has become a shorthand response for what do you want, used both to start mock arguments and to shut them down. Its short length and clear emotion keep it reusable across many contexts.