Not that anyone will care at this point, but I'm reading Scott Ian's book and he says that A.I.R. is indeed "Adolescences In Red". It was just a play on words from the classical music song 'Rhapsody in Blue' and has nothing to do with the lyrics or song itself. It's just a title.
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I used to be with it, but then they changed what "it" was. Now what I'm with isn't it, and what's it seems weird and scary to me, and it'll happen to you, too.