Plankton is the tiny villain from SpongeBob SquarePants, the Nickelodeon cartoon that began in 1999, forever scheming to steal the Krabby Patty formula. Short clips of him yelling have circulated for years as reaction audio, and this stretched aaaugh became a scream meme because it exaggerates his usual defeat. Shared in edits, chats and soundboards, the cursed version feels louder and more desperate than a normal cartoon shout, so creators keep reusing it whenever a character fails spectacularly, gets caught, or reacts far too strongly to something small.