Crossover Thrash is a music genre that blends elements of thrash metal and hardcore punk. It emerged in the mid-1980s, characterized by fast tempos, aggressive guitar riffs, and shouted vocals. Bands in this genre often address social and political issues in their lyrics, reflecting the punk influence. Notable bands associated with Crossover Thrash include Suicidal Tendencies, D.R.I. (Dirty Rotten Imbeciles), and Municipal Waste. The genre gained popularity in underground music scenes and has influenced various subgenres, contributing to the evolution of both metal and punk music.