(The) 215: The area code for Philadelphia and its northern suburbs. "Yeah, I'm representing the 215!"
(The) 700 Level: The cheap seats located in Veterans Stadium, high atop the Vet. The 700 Level fans were known for their rowdiness and violent behavior, especially against opposing fans. The 700 Level fans were stereotyped as more blue collar and working class Eagles fans.The term "700 Level Mentality" is used to describe hardcore fanatical mentality of many Philadelphia sports fans.
Blue Route: I-476 between Chester and the Pennsylvania Turnpike (See Northeast Extension). The Blue Route got its name from the color of ink used to draw the proposed route for the "Mid-County Expressway" (its official name). A red route and a green route were also proposed, but the Blue route is the one that was actually constructed.
Boo Birds: Philly fans who boo the home team (usually the Eagles) whenever they are not performing well. "Another three-and-out? Here come the boo birds..."
Broad Street Bullies: The Philadelphia Flyers. First came into play in 1970s, when they won back-to-back Stanley Cups. Name came from the fact that they play on Broad Street, and their "goons" (most notably Dave Schultz and Bob Kelly) would frequently attack opposing players, making them "bullies". This term is also associated with Flyers fans due to their rowdiness and aggression towards opposing fans.
Hoagie: A sandwich, consisting of a long bread filled with lunchmeats, cheeses, and vegetables. What would be referred to as a "sub" in other parts of the country. The term originated in Philadelphia.
Jawn, Jawnt, or Joint: Noun that is used in casual conversation to describe any person, place, or especially a thing. The slang term is often pronounced as "jawn" or "jawnt," but is most likely a corruption of the word "joint." 
Judy Garland Park: Officially named Schuylkill Park, a well-known outdoor gay cruising area at the edge of Center City, at the Schuylkill River waterfront between Locust and Lombard Streets