This has no real rules but here are some that I'm going to follow:
1. I am personally disregarding participation in feedism/intentional weight gain as criteria for entry in most cases. Yes, it's dumb, but if we nominate every girl who got fat for money and sexual pleasure we'd be here all night. I might make exceptions in certain cases depending on how fucked up a certain situation is (Mochii speedrunning herself into ill health and having to quit, Echo becoming massively immobile and winding up in a nursing home in her 30s).
2. Try to provide examples if you can - I am going with someone who seemed pretty empty headed in her content but we also have some real deal evidence that she's a dunce in her day to day life as well. You can definitely use stuff from content as an example, though.
3. I am personally not going to factor in severe mental illness - Jae, Reenaye, etc. But I may already break this rule depending on how you feel about my second nominee.
So, first up: I nominate BBBXXL. She obviously seems dumb as a sack of bricks when you watch her porn, but then there's her notorious domestic violence arrest and mugshot. And being named "Jonda Sue" has to earn you stupidity points, right?
I also nominate Big Cutie Britt - which I acknowledge is a grey area because she allegedly fried her brain on rave drugs. But her ranting and raving on social media and even on bbwchan that she transcended her form and became god is gloriously unhinged stuff. Maybe she's more crazy than she is dumb.