The movie itself doesn't even have to be aware of it. You just need some link back to it.

Take Street Fighter, The Three Musketeers, or Robin Hood Prince of Thieves. Absolute dog shit, all three of them. But then an actor appears who knows exactly what he's in. All villains in these cases. They know it's bad. It's a pantomime. Amateur hour all over the place. The script is awful, the leads can't act, half of them are snorting coke between takes, or getting drunk. They've been here before.

But they've decided that they're going to enjoy it anyway, and now, so can you.