Thrashcore (also known as fastcore) is a fast tempo subgenre of hardcore punk that emerged in the early 1980s. Thrashcore is essentially sped-up hardcore punk, with bands often using blast beats. Songs can be very brief, and thrashcore is in many ways a less dissonant, less metallic forerunner of grindcore. Like hardcore groups, thrashcore lyrics typically emphasize youthful rebellion or antimilitarism. In some ways, the genre is aligned with skateboarder subculture.

Thrashcore (also known as fastcore) is a fast tempo subgenre of hardcore punk that emerged in the early 1980s. Thrashcore is essentially sped-up hardcore punk, with bands often using blast beats. Songs can be very brief, and thrashcore is in many ways a less dissonant, less metallic forerunner of grindcore. Like hardcore groups, thrashcore lyrics typically emphasize youthful rebellion or antimilitarism. In some ways, the genre is aligned with skateboarder subculture.