how do Folks Talk Where You're From? (Baltimore Accent)

[CFH]

I don't have much of an accent. Well, that is a lie as everyone has an accent of some kind, but I don't really have a distinctive regional accent. I spent too much of my childhood moving region to region to ever get set into talking a set way. I suppose if anything my accent is more RP (recieved pronunciation) than anything else. My parents both have distinctive Sussex accents whilst my sister has a Yorkshire inflection. I don't have either but sometimes find my accent responding to whoever I am conversing with at the time.

I honestly never thought I had an accent, until just recently, and that everyone else did. As I have started to meet people from other places in the last year, them laughing at me while I talked and calling me a Yooper, well, that was the first tip off I might in fact have a bit of one.

What does that mean?