The laugh comes from Waldemar Kiepski, called Walduś, a central character in the long running Polish sitcom Świat według Kiepskich, which first aired in 1999. Played as a lazy, dim witted adult son, his distinctive cackle became one of the show's most recognisable traits. Clips and extended loops of the laugh spread widely on Polish YouTube and meme pages, often titled as an annoying laugh lasting for hours. It remains popular as a shorthand reaction for foolish behaviour and forced, irritating laughter.