We call folks/things bamas all the time in the south. It's a black southernism for someone or something that is country/unsophisticated/out of style/behind the times (a lot of black northerners will use it to refer to southerners, too) and white folks mostly use it in reference to University of Alabama students/alums/fans.

Bey's impact getting it acknowledged officially tho. This woman is something else!