A hardcore/obsessed fan of a band that posts on message boards, scours the internet for the newest info, buys their merchandise/music, attends the majority (if not all) of the band's gigs, etc., but is not a stalker or performs sexual favors like a groupie. About as close to a band as a roadie, but not.

An obsessed audiophile with some self-respect.

A phrase to describe someone who is cognitively degenerating. Synonym of "going off the deep end". Can have varying degrees of severity.

Reference to the song "Hey You" by Pink Floyd. The line "and the worms ate into his brain" makes no sense in an otherwise linear and literal narration throughout the lyrics.