CaseOh and Sketch became a popular streaming duo through their loud, chaotic collaborations on Twitch, with short moments from their streams spreading widely as clips and memes in 2024. This line uses the abbreviated form WRUD for what are you doing, a phrase fans associate with their back and forth banter. Clipped from that style of exchange, the sound spread as a reusable reaction for edits and soundboards, kept alive because the question fits almost any baffling moment without needing extra context to understand it.