I keep reading all these fics where authors give Bucky a Brooklyn accent and write it like it's something sexy but imo that's not a very sexy accent so I offer my fanon counterpoint:
Bucky one day says something with a little touch of a Brooklyn accent and Tony teases him for it. Steve and Bucky both retaliate by continuously trying to one-up each other by speaking in the most completely over-the-top, outrageous Brooklyn stereotype
I mean, I'm sure it's not impossible. French accents drive me up the wall but I once in my life met one man with a French accent that made me want to hire him to narrate the rest of my life