that’s SO Clampett
A phrase used to disparage something, usually something very déclassé that someone wears or the manner in which a person has decorated their home, taken from the popular sixties’ TV show, “The Beverly Hillbillies” which featured the endlessly low-brow nouveau riche hicks, the Clampett family.
Oh my, that’s SO Clampett; look at this horrifyingly backward, bumpkin decor!