I concur. I am not a young person. And yet, I have an idea of what "rule" means in the title of a shitpost, and I shouldn't even know what "shitpost" means. I have never seen a formal definition for either of them. I don't think "rule" (in that context) even has a rigid definition yet. The meaning isn't just communicated by example; it is being invented by example.

I still feel like there has to be a really big turtle at the bottom who is not standing on another turtle. Words that mean things in themselves. But I've never been there.