The phrase comes from Danish, where det lyder som Oskar means it sounds like Oskar, and the clip is paired with the English slang sus for suspicious and the tag suggesting maybe it is Oskar. It circulates as a short reaction sound on user generated soundboards, shared in its original Danish even by viewers who only understand the tone. Its appeal is the specific name and the instant callout feeling, which has kept it in use for voice reveals, mistaken identity jokes and playful accusations between friends.