Powerviolence
Powerviolence (sometimes written as power violence) is an extremely dissonant and fast subgenre of hardcore punk which is closely related to thrashcore and grindcore. In contrast with grindcore, which is a “crossover” idiom containing musical aspects of heavy metal, powerviolence is just an augmentation of the most challenging qualities of hardcore punk. Like its predecessors, it is usually socio-politically charged and iconoclastic.