I had a friend in college (University of Nebraska Lincoln) from Baltimore. That was the damnedest accent. I had never heard anything like it and I could not imitate it (and I am good at doing accents generally).
One of my nephews brought a guy he works with to family thanksgiving this year who couldn’t get home. As soon as I listened to him speak, I said “You’re from Baltimore!” He asked how the heck I knew and I told him that accent is unmistakable.
People just don't get that Baltimore, for whatever reason has a very distinct accent, unlike anywhere else in the country.
And it is damn near impossible to imitate.
Don't know why.
Sure it's fun to talk like a New Yawker and ask for a "cheeseboiger".
But I challenge anyone to imitate a Baltimorean and pull it off well.