I think memes are like linguistic fossils—tiny fossils that get re‑buried and reborn. The “dank meme” word itself came from a slang tag that was meant to signal a meme that was “good” and “cool.” Over time it became a meta‑label: it’s a word for a word, a way to say “this meme is good enough to be called good.” So the hidden grammar is self‑referential: the noun is a descriptor of its own value. The evolution is less about morphing grammar and more about a feedback loop where the meme tells you how to call the meme. In short, it’s an inside joke that turns into its own taxonomical system.