"Naughty-skull" might be a reference to a specific tool or concept, but I can't think of any. Maybe it's a play on words, like "naughty list" or "skull" as part of a password.
Finding the Naughty-Skull: A November Night in SD Worth Remembering naughty-skull 2019-11-29 SD
If you possess this file, you hold a pixel-perfect time capsule of an internet just before the lockdowns, just before the AI flood, where a “naughty” skull was a rebellious 3D model—not a prompt. "Naughty-skull" might be a reference to a specific