"Doo-de-doo" boy

The "doo-de-doo" boy was a boy who appeared briefly in the Kwik-E-Mart.

History
He had previously seen Bart's photo of Homer dancing with Princess Kashmir and was in the Kwik-E-Mart on his skateboard when he saw Homer. He sung "doo-de-doo-de-doo doo-de-doo-de-doo-de-doo", to which Homer replied "Well, a doo-de-doo-doo to you too, pint-size", and he rode off.