Those super adorable, very affectionate couples that you always see on the A,C or the L or any other brooklyn-bound trains in new york city. They are usually the intellectual type, grad students/thirtysomethings who can't afford/don't want to live in manhattan; or grown-up hipsters, and often still have the leftover trappings of the emo (square glasses, converse).
1. "I was coming home from the park on the C and I saw the most adorable brooklyn couple holding hands and being quietly witty to each other and I just about died."
2. A perfect example of a brooklyn couple would be Jonathan Safran Foer and his wife, Nicole Krauss, both successful writers.