What is "deathcore"

n. (context music English) An extreme fusion genre of death metal and metalcore.

Deathcore is an extreme metal fusion genre that combines the characteristics of death metal and metalcore and sometimes hardcore punk. It makes use of death metal riffs and blast beats, as well as metalcore breakdowns. Deathcore gained most prominence within the southwestern United States, especially Arizona and inland southern California (mostly the Coachella Valley), which are home to many notable bands and various festivals.