A New England redneck typically from Connecticut but can also be from Rhode Island and southeastern Massachusettes.
Swamp Yankees are charachterized as "salt of the earth" folk with good common sense, skilled with tools and building, clever speakers who reject modern trends, typically hunt or fish and have no problems eating squirrel or possum. They can be seen in old general stores, driving old pickup trucks, farming and wearing one piece overalls.
The term is used as an insult to those from urban areas but much like the "n" word it is used as a term of endearment and jest amongst other Swamp Yankees.
Did you see the huge tires he put on that crappy old truck....it's only Connecticut, what a swamp yankee!
Every spring old Joe the swamp yankee opens up the general store in podunk Connecticut for those wanna be hunter yuppies from the city.