"The DMV".
I live in Washington, DC, and I think about 15 years ago, some people started referring to the DC-Maryland-Virginia metro area as "the DMV". Aside from constantly thinking they mean the department of motor vehicles, when you're in this metro area, we're much more interested in knowing a more detailed location. Imagine meeting someone in Manhattan and asking "where do you live?" and their reply is "the New York metropolitan area". No, you really want to know if they're from the city, NJ, or CT, or brooklyn, queens, etc.
It really annoys me, because I think they are embarrassed about where they live (as in they live in a well-off suburb and want to be seen as gritty)