What is Polyphemus?
1.
1)
Greek Mythology
The Cyclops who confined Odysseus and his companions in a cave until Odysseus blinded him and escaped.
2)
Urban Slang
A man's penis.
Perhaps author Robert Anton Wilson unknowingly morphed this word into slang via his book, "Prometheus Rising"... but then... i'd just be guessing, when really I should simply:
.ASSUME NOTHING.