The phrase comes from the closing section of "The Next Episode" by Dr. Dre featuring Snoop Dogg, a track released in 1999 on the album 2001. Online, that final line escaped the song and became a standalone meme sound used in edits, remixes and comedy videos for years. It stayed popular because the delivery is short, unmistakable and easy to time as a joke ending. It often appears in older internet-style edits alongside clips like Directed by Robert B Weide and MLG PWNAGE.