The line comes from YouTuber and streamer Cr1TiKaL, also known as penguinz0 and MoistCr1TiKaL, whose deadpan commentary made the sudden excited outburst especially funny. Clipped from his longer catchphrase about something being what he had been waiting for, the Woo Yeah Baby moment spread through TikTok, YouTube Shorts and gaming edits around 2021. Editors began making bass boosted remixes to exaggerate the drop for ironic hype. It remains popular because the delivery is sincere, short and instantly recognisable even without video.