Shitcore is an offshoot of crust-core and fetish-core mixed together in an especially shitty manner. The quality might sound like shit or perhaps the message in the music is based on actual shit. However you look at it though, Shitcore stands in a world of it's own much like post-post modernism (or performatism) simply because it exists outside of the normal perception of noise with its overpowering shittyness. .
