What? Are you trying to find posts that don't have art by a specific artist? It's kind of hard to tell what you mean

I assume what they're referring to is an image that doesn't have an artist to look up.

Then "artist_request" would be the tag to search. It hasn't been applied to all uncredited images, but it is on 100,000+ of them.

I mean something like -artist

Just use the artist_request tag, it accomplishes basically the same thing.

if you mean you want to make sure you don't see art by a certain artist, put -artistname in the searchbar. you can also put the artists name in your blacklist. so for instance if you didn't want to see art by ThiccWithAQ you'd put "-thiccwithaq" in the search bar, or you'd put "thiccwithaq" in your blacklist.

if you mean art that's ai generated rather than drawn by a person, put "ai_generated" in the search bar