New Orleans cemeteries (due to the high water table, people in New Orleans are buried above ground).
A cheesesteak with Provolone cheese and onions.
The rash one gets after swimming in Green Lake, a man-made lake located north of downtown on the other side of Lake Union. "The itch" is relatively harmless, but considering that it is caused by the many ducks and geese (and all that they secrete), it has caused many Seattlelites to swim elsewhere.
Slugging is a form of hitchhiking in DC that benefits both the hitchhiker and the driver. The driver can use the much faster HOV lane after taking on a passenger.
A perennial New York dessert featured on Seinfeld, usually consisting of a round, cake-like cookie topped with half-vanilla and half-chocolate icing. Also referred to as the Half and Half Cookie.