The 'Woo Yeah Baby! That's What I've Been Waiting For' meme originates from a viral video by popular YouTuber and streamer MoistCr1TiKaL, also known as Charlie or penguinz0. In the original clip, Charlie displays an explosion of pure, unbridled hype while reacting to a long-anticipated event, shouting his now-famous catchphrase. The meme took off because of its high energy and Charlie's distinctively monotone-yet-enthusiastic delivery, making it the perfect reaction for any long-awaited release, update, or personal achievement. It is frequently used in the gaming and tech communities to signal that a long period of waiting has finally come to a satisfying end.