The Brian Jonestown Massacre (frequently abbreviated as "BJM" or "The BJM") are a neo-psychedelic rock band, founded in San Francisco, California, in the early 1990s, led by Anton Newcombe.
The BJM's music can mostly be described as "neo-psychedelic", since it is generally perceived to be "mind-expanding" music, and because it can be seen as being a "continuation" of music from the 1960s.
The name is an homage to Brian Jones, original lead guitarist for the Rolling Stones.
The Brian Jonestown Massacre is one of the best bands of my generation. Too bad they've never had much commercial success.