NOBODY in NJ says “Joisey.” Only people in Bowery Boys films and that accent has died even on NY.
It is said that English teachers in Brooklyn would post signs in their classrooms reading, "there's no joy in Jersey."
They say Jerrsaey
That's too bad.
It was around in 1989 when I did my cross country motorcycle trip. On a whim I wanted to stop at an old friend's house in Mays Landing. I tried looking up his number, but the phone booth I was at had the phone book ripped out.
I yelled out something like "Why the hell is the phone book gone?" A random guy walking past turned his head and quipped, "Cuz you're in Joisey."
“that accent has died even on NY”
If true, none too soon.