Koning van Vlaanderen literally means king of Flanders in Dutch, and the phrase is best understood as a piece of Flemish and Belgian internet humour rather than a line from a known film or song. Flanders is the Dutch-speaking northern region of Belgium, so the title alone carries a local identity joke that Flemish viewers recognise instantly. Online, very short clips like this circulate on soundboards precisely because they can be dropped into memes, chats and edits without explanation, letting a familiar regional reference do the comic work in under a second.