We had one in our section a few rows down so i just started yelling things back at him.
Fortunately I’ve spent enough time in Philly to pick up on both that stupid accent and some of their cultural touchstones. I had many choice things to say about Wawa, hoagies, the shore, Delco Trash, etc.
I also had to steal a bit from Bill Burr and spent about half a quarter railing on him for their greatest sports hero being a fictional boxer.