Thrash is a subgenre of heavy metal music that emerged in the early 1980s. It is characterized by its fast tempos, aggressive guitar riffs, and intense drumming. Bands like Metallica, Slayer, and Megadeth are well-known for their thrash sound, which often includes socially and politically charged lyrics. The thrash music scene gained popularity in the United States and later spread to other countries, influencing many other genres. Thrash is often associated with a high-energy performance style, and it has a dedicated fan base that enjoys the raw power and speed of the music.