The line comes from SpongeBob SquarePants, the long-running Nickelodeon animated series created by Stephen Hillenburg, where the Krabby Patty is the famous burger served at the Krusty Krab. SpongeBob works there as a fry cook and treats the burger with almost obsessive affection, which is why the line feels so true to his character. Clips of the moment have circulated widely as a reaction sound on social media and soundboards, especially in food videos and SpongeBob memes, because the enthusiasm is instantly recognisable even without context.