Top Definition
A bro from Boston. Generally shouts obnoxious things with a strong accent while wearing an upside down visor and a Red Sox shirt.
Bro 1: Bro, I had some ahhsome brofast this morning down at the South End.
Bro 2: Dude, you're a total Brostonian.
by ..'...-=...,.o......`o=^o> December 06, 2009
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