He's taking a line from an old Monkees song "Zilch", in which it is just a nonsense lyric. But he imbues it with meaning by using it in this damning indictment of J.R. Bob Dobbs, and the Church of the Sub-Genius. Considering he uses a symbol from the comic book and atheist manifesto "Transmetropolitan", it is possible he is actually using the Sub-G as a stand-in for religion in general.
He's taking a line from an old Monkees song "Zilch", in which it is just a nonsense lyric. But he imbues it with meaning by using it in this damning indictment of J.R. Bob Dobbs, and the Church of the Sub-Genius. Considering he uses a symbol from the comic book and atheist manifesto "Transmetropolitan", it is possible he is actually using the Sub-G as a stand-in for religion in general.