Gabber
A Gabber is someone who talks like they're in a fancy restaurant, but when they're with their own kind, they sound like they just woke up from a nap. They switch accents like they're playing a game.
'He said, ‘Gabber, come here,’ and then talked like he was a king.'
'She talked like she was in a movie, then went back to her normal accent.'
'He switched accents so fast, I thought he had a second head.'