You are just making all of this up!"
LOL, really? Go ahead a google "washashore" and take your pick. here's just one,
http://www.capecodtoday.com/blogs/index.php/Washashore2
It is a term directed toward non natives of New England, people who are said to have "washed ashore" and decided to stay. I am making nothing up. I lived there for 12 years on the Cape and can cite you many instances of what is considered the typical and boorish "circle the wagon" attitude of the average native toward what they consider to be an outsider.
Listen, all that needs to be said about you folks in NE is you worshipped the Kennedy's, one of whom was a serial womanizer and the other who was a drunken, murdering slob.
Been living here all my life and never heard that term before.