Acronym for Red Sox Nation, a human sub-species single-mindedly obsessed with all things concerning the Boston Red Sox. May display odd behavior such as camping out all night in the rain for opening day tickets, chanting "yankees suck" at a game between the Red Sox an opponent other than the Yankees, and/or sputtering into angry convulsions upon hearing the name "Grady Little."
Strengths: team loyalty, blind faith and snow shoveling prowess
Weakness: wicked bad driving manners
That RSN fool just sold his first-born child for season tickets.