There are some articles which use the word bonehead classes in the 70s. But I’ve never seen it outside of those articles and from my dad’s mouth lol and myself
People actually think I have a southern accent sometimes.
And I think it’s just because I’m so alone. And I watched a lot of really old movies which have transatlantic accents
the red places on the heat map don’t necessarily indicate that you sound distinctly from-there, it could also indicate that the two regions have similar accents to each other (for migration reasons, sometimes just coincidence reasons)