Sub-neighborhood in East Mount Airy, northwest Philadelphia pa. It was once a hot-bed of crime, however has since become a lower-to-middle class neighborhood that still "fronts" a hardened appearance because of its dirty streets and predominantly uneducated thug element. Criminal hopefuls who reside in this area refer to it as "up town," in reference to its location farther above the more "real" North-Philly. They will sometimes go so far as to say they live in Germantown, however that area doesn't technically begin until you travel south of Washington Lane.
Dogtown philly, holla!
to which one replies: " whatever, you're from Mount Airy."