The phrase is Dutch, mixing a direct insult with an English swear respelled as focking for emphasis, which is common in informal Dutch online speech. Clips like this spread as short reaction audios on soundboards and in chat apps, where users share them instead of typing an angry reply. Its popularity comes from how reusable it is: no context or backstory is needed, the anger is clear even to non-Dutch speakers, and the brief length makes it easy to drop into edits, streams and short videos.