Been living here all my life and never heard that term before.
I gave you a link to a newspaper which uses the term. It is very, VERY common on the Cape. Maybe not so much off Cape. The Cape is almost all shore line anyway and if you live inland and perhaps not in MA it isn’t used. But because you never heard of it doesn’t mean it doesn’t exist.
Hell, look at all the people in NE who loved the Kennedy’s despite their record of womanizing and even murder. Apparently they are clueless to what is going on around them as well.