Coined by incoming Speaker of the House Nancy Pelosi.
( No, not a "certain class." As the first female speaker of the house she was specifically talking about women. They were the original victims in the term "glass ceiling." )
Distinguished from a glass ceiling because not only is this class prevented from rising to the next level, they cannot even see what is going on up there.
( LOL NO, not even close. It's because there's a shit ton of marble in the capitol building, not because she randomly pulled marble out of her ass to use as an example of an opaque material. )
GJ UD for putting an obviously ignorant interpretation as the definition of the day! DURRRRRRR