"Metal Up Your Ass" was the original album name for Metallica's debut record, "Kill 'Em All." A few weeks before the release their record label decided that the name was too gruesome, especially for American audiences. The band got so angry about the name change they started to talk about killing all of the record label employees. So then the album name "Kill 'Em All" was born.
Metallica is one of the most famous metal bands to ever exist, and for good reason. They played a huge role in the uprising of thrash metal in the 80s and 90s and had over ten #1 hits. Metallica has won 14 Grammys and sold over 100 million records worldwide. They're known for their high-energy stadium performances full of pyrotechnics. The band was originally created from a single newspaper ad when the drummer Lars put out a call for musicians to jam with. Well, the rest was history.