The sound comes from SpongeBob SquarePants, the Nickelodeon animated series that premiered in 1999 and built many of its jokes around SpongeBob's exaggerated emotional reactions. Clips and stills from the show have circulated as reaction memes for years, and this disappointed moment became a shorthand for a letdown that is sad but still funny. Short audio versions spread through meme edits, soundboards and social videos, where creators reuse the familiar tone to signal failure without needing dialogue or explanation for the audience watching it.