I’m bilingual in most of these things, but temperature… Fahrenheit makes no sense to me, I really need a converter to set my AC.

As far as I understand, a bimbo is commonly a person that is superficial and put a lot of effort in an exaggeratedly hyperfeminine appearance, and people into bimbofication will sometimes want to be (or to look) dumbed-down to fit that persona, and I think this is what this post is referring to.
The difference between graveyard and exile in this context is that graveyard for non-creature spells is like a pile of old memories that you keep and can still access, while the exile is like becoming non-existent or out of reach.
Now that I look into it, though, I feel like the mill cards flavor is pretty fitting for the theme. Besides the mill and grind cards, it’s a lot of stuff that plays with your head, like “Mesmeric Orb”, “Mindcrank”, “Mindskinner”, “Fractured Sanity”, “Memory Erosion”, etc. While the cards that exile stuff from opponents libraries are less focused besides a few Faeries.

It’s all about intent. Unless your opponent has Squee, the Immortal, Riftsweeper or Pull from Eternity in their deck (and no one does), when you exile their cards, if it’s not to play them with an Etali-like effect, they are gone for good.

The graveyard can be seen both as a literal cemetery for creatures and as a a pile of forgotten memories. I think cards that exile the opponents libraries are closer to bimbofication, as the knowledge is then forever lost, rather than becoming memories of the past.
Of course there are fewer cards that can mass exile opponent’s libraries, so it’s a bit tricky to do in a real game. In bracket 2-3, I like Maralen, Fae Ascendent as a clone deck to mill into exile the opponents, especially when playing against green decks.