"There's such a fine line between stupid and clever."
This movie kind of covers all my ridiculous interests: music criticism, pop culture, the influence of Monty Python on everything else that came downstream, teenage boy humor. I don't know if it "defined" me but it certainly came along at a pretty pivotal point in the development of my sense of humor.
Fun memory; my best friend and I saw this movie when it first came out in the theaters at a movie house in Eugene, OR where the rest of the audience didn't seem to understand that it was satire (I don't know how you could miss that, in retrospect). We were laughing hysterically (maybe stoned, too) and got the evil eye from a bunch of local heshers who seemed ready to give away their Judas Priest concert tees in exchange for a Spinal Tap version.