Someday I'm going to write down all the slang terms for getting drunk, dying and playing Scrabble, just to see which list is the longest. I suspect Scrabble, because it's the most fun!
In Massachusetts, what's known elsewhere as a roundabout or traffic circle is a rotary.
These are very old Bostonisms I learned from my mom: A straight pin is a common pin (to distinguish it from a safety pin). Baseboards are mopboards. If you have a double sink, the side that isn't being used to wash the dishes in is the settub.
I haven't lived in New England for 30 years, so I don't know if anyone still says "tonic" for soda or pop. When I was a kid "soda" meant only one thing: an ice cream soda. Coke, Pepsi etc. were tonic.
This is a pronunciation thing, not a saying thing, but how do you pronounce "sauna"? Like "fawn" and "dawn" or like "sauerkraut"?