Sometimes English is a foreign language even for grew up speaking it, especially when you get into colloquialisms. For example, "Brummie". What's Brummie?

I decided to find out with a little help from my friend Google. So for any other folks reading this thread who don't know what that word means, here's a quote from a wikipedia page:

"Brummie (sometimes Brummy) is a colloquial term for the inhabitants, accent and dialect of Birmingham, England, as well as being a general adjective used to denote a connection with the city, locally called Brum. The terms are all derived from Brummagem or Bromwichham, historical variants or alternatives to 'Birmingham'."

http://en.wikipedia.org/wiki/Brummie

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And what's "Northern Soul"? Would you site some examples that Americans might know {bands, records}; Duran Duran? UB40?

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Also, I feel as though I'm tiptoeing in an area that has land mines, but doesn't "British" sometimes also mean "Irish"? I suppose from the comments that I've read in this thread that British doesn't mean Irish with regard to Kevin Rowland. But that isn't always the case, is it?