Elvir Laković, known as Laka, is a Bosnian alternative pop singer who represented Bosnia and Herzegovina at the Eurovision Song Contest in 2008 with the song Pokušaj. His eccentric performances and costumes made his clips widely shared online long after that appearance. Brko comes from his official video material credited under his full name, and the short four second cut has since circulated separately as a standalone sound. Its appeal online rests on that recognisable Laka delivery, which fans reuse for character entrances and comic reactions.