Plankton is the tiny, scheming owner of the Chum Bucket and the longtime rival of Mr. Krabs in SpongeBob SquarePants, the Nickelodeon animated series that began in 1999. His eager, raspy voice and constant failed plans have made him a favourite for reaction clips, and this repeated yes has circulated online as a short meme sound for moments of excited agreement. Creators reuse it because the threefold repetition is instantly recognisable, easy to drop over a win or a reluctant yes, and still funny without any extra context.