This was Bella Swan's first conversation with Edward Cullen:

Edward commented on her profile: "You like Metallica? Cool?"

Bella replied: "No, it says Meta-llica. Meta- as in self-referential. Can't you read? You stupid, illiterate vampire."

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Meta-llica is a 4thwallcore band. 4thwallcore is like self-referential metalcore.

They are known for their song 'Dogfight', in which they recorded a dogfight, dubbed it onto the song instead of metalcore vocals, and pretended to cover it up. Numerous interpretations of the 'lyrics' circulate on the Internet, primarily among stupid people.

They also embed self-referential subliminal messages in their songs, like, 'you got subliminal message'd'.