Lekker is a Dutch and Afrikaans word used for tasty, nice or good, which explains why this clip is used as praise even outside those languages. The origin of this specific recording is not clearly documented, so its life is mainly online as a short shareable reaction clip. It spread in soundboard and meme contexts because the stretched pronunciation is recognisable from the first second and needs no setup. It is still used because the meaning is flexible, covering food, success, comfort and anything that lands as genuinely satisfying.