The crossword solution for the term 'Squishee Seller on 'The Simpsons'' is APU. Apu Nahasapeemapetilon is a recurring character in the animated television series The Simpsons. He is the proprietor of the Kwik-E-Mart, a popular convenience store in Springfield, and is best known for his catchphrase, 'Thank you, come again.' Apu is an Indian immigrant who has become a successful business owner in the United States.