Trash metal is a form of heavy metal music that disregards traditional song structure, musicality, and instrumentation.
Trash metal is a subgenre of heavy metal music with riffs and vocals that are harsh or discordant. A common trait for these bands is the use of guitar distortion and feedback that creates a thick, heavy sound. The genre was first introduced in the 1980s by bands such as Metallica, Slayer, Megadeth and Anthrax.
Trash metal musicians would use down-tuned guitars to create a heavier sound.