The line comes from The Simpsons, where Apu Nahasapeemapetilon runs the Kwik-E-Mart in Springfield and repeats the phrase to almost every customer. Voiced originally by Hank Azaria, it became Apu's best known catchphrase during the show's 1990s peak and was quoted widely in everyday conversation. As clips moved to soundboards and short form video, the farewell was reused out of context as a generic, slightly mocking goodbye. Its lasting appeal is its instant recognition, even for viewers who have not watched an episode in years.
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Apu from The Simpsons saying thank you come again in his Kwik-E-Mart catchphrase voice, used for funny goodbyes and customer service memes online.
This is Apu Nahasapeemapetilon delivering his signature Kwik-E-Mart farewell, thank you come again, in a cheerful, heavily accented singsong. The short clip is tight and polite on the surface, but the exaggerated delivery makes it sound sarcastic and instantly recognisable. Listeners hear the joke right away because the line has become shorthand for a dismissive shopkeeper goodbye. It lands as a playful brush off rather than a real thank you, which is why a brief, friendly phrase can get such a big laugh when it is dropped at exactly the wrong moment.