Ok. For those out there who keep askin themself what does 'metalcore, mathcore' and all genres that have core on it means. .well here's your answer. This was taken from www.wikipedia.com.
Acidcore - an alternative name for freeform hardcore. Breakcore - fusion of hardcore, jungle and techno AKA Noizecore Christcore - Christian hardcore punk or metalcore. Cuddlecore - punk-influenced twee pop Darkcore - style of hardcore techno Discore - alternate term for D-Beat punk. Drillcore - a cross between breakcore and drill 'n bass Emocore - later and better known as emo Emo-Metalcore - fusion of metalcore and emo Funcore - a term used by Dutch based Babyboom Records label to describe bouncy techno Folkcore - fusion of hardcore punk and folk music Funkcore - fusion of hardcore punk and funk Glamcore - fusion of riot grrl, thrash metal, and glam rock Gloomcore - simple music, with a story that usually has to do something with drugs Gorecore - goregrind played in a more traditional grindcore style Gothcore - fusion of hardcore punk and gothic music Grindcore - a thrashcore/crossover thrash hybrid Happycore - variety of swift, hard trance music AKA Happy Hardcore Hatecore - white power hardcore punk Hopcore - fusion of hardcore punk and hip hop music Homocore - alternate term for queercore Horrorcore - style of hip hop with graphically violent and sexual lyrics Horror hardcore a style of Misfits influenced hardcore punk Japcore - Japanese hardcore punk Mathcore - a fusion of metalcore and math rock Metalcore - fusion of hardcore punk and heavy metal Nerdcore - style of hip hop with nerd-themed lyrics Noisecore - a largely anti-technical, anti-clean sounding form of grindcore, sometimes an alternate term for noise music AKA Breakcore Norsecore - style of black metal Nintendocore - is a genre of music inspired by the music or soundtracks which accompany 8-bit video games, most notably those on the Nintendo Entertainment System (NES). Polkacore - fusion of hardcore punk and polka Popcore - fusion of hardcore punk and pop punk Punkcore - anarchistic hardcore techno mixed with punk rock samples Queercore - style of hardcore punk with gay and lesbian-themed lyrics Raggacore - fusion of breakcore and ragga Rapcore - fusion of punk, heavy metal, hip hop, and funk Sadcore - style of late '80s indie rock with sadness and loneliness-themed lyrics Skacore - fusion of hardcore punk and ska punk Skatecore - alternate term for skate punk Slowcore - alternate term for sadcore Sludgecore - a music style similar to sludge metal Speedcore - music with very fast bpm (250bpm and faster) Spazzcore - term for over-the-top spastic and volatile punk. Synthcore - alternative name for electroclash. also a type of coldwave without guitars. Stenchcore - early term for crust punk Terrorcore - a subgenre of hardcore techno with "scary" or horror themed samples Thrashcore - fast(er) hardcore punk Trancecore - uplifting and epic music, close to freeform Twangcore - alternate term for alternative country Thugcore - fusion of hip hop and metalcore or hardcore punk Yardcore - an alternative name for raggacore x it's the time of death x @9:59 PM