What is Demon Burger?
1.
A slang term for the black metal band
"Did you hear their new album? Wow, they're really Demon Burger now!"
See
2.
A term that is a play on the band name "Dimmu Borgir" (Dark Castle in the Icelandic tongue), the symphonic metal band from Norway. Often used as a derogatory substitute name.
"Hey, you heard anything from the new demon burger album?"
"Demon Burger used to be black metal, now they're a bunch of posers."
See