Lyric discussion by ampedbif 

As explained by Sufjan himself: Adz is a misspelling of "odds."

Why did you call the album The Age of Adz?

[Laughs] I don’t know! I don’t know… I mean the [word] "Adz" is really a misspelling of "Odds." That’s taken from Royal Robertson, he has all kinds of text in his work, and his visions are all written out in this messy script. He was a sign painter for a living before he was an artist, and his signs became double entendres, messages that had dual meanings, because of all the misspellings and grammatical mistakes. The Age of Adz is reflecting the subconscious, free association way of thinking that happens when you’re not censoring yourself. Royal’s work is very much about impulsive free association, and the lyrics on The Age of Adz also follow that [impulse].

eyeweekly.com/music/interview/article/103905

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