A play on the terms
hardcore, deathcore and other sub-genres of heavy metal
music with the suffix 'core', fagcore describes
music made by untalented hacks trying to pass themselves off as serious musicians. Commercially-motivated, most fagcore artists are teen and mainstream orientated.
Linkin Park, Jesse McCartney, Yellowcard and
Fall Out Boy are arguably some of the most prominent fagcore artists.
Sentence usage can be as follows:
"Linkin Park is
nothing more than
fucking fagcore crap."