This is August 15 and a few days on either side. When all the leases in the central city turn over at the same time, many students and other renters leave vast piles of unwanted belongings on the curb as they change apartments. These items are often taken home by others as the population garbage picks the piles. When someone asks where you got an item, you reply "Hippie Christmas."
Short for the "Segway Human Transporter", a two-wheeled, motorized sidewalk 'scooter' that one can easily rent or buy in D.C.
Carry a heavy load or a bulky package for a distance: "The MTA is on strike every Christmas, so we schlep our packages from Macy's to Grand Central"
This is one of the many nicknames for the giant sculpture of Jesus Christ. The photos leave no doubt where the nickname comes from.