1 definition by Willy H Fo Rizzle

used as a substitute for penis, and different forms can be used as a substitute for "fuck", a pronoun, an adjective, or just about anything else fathomable. It is a very versatile word.
Codex as a noun: My codex itches.
Codex as a pronoun: Hey Codex!
Codex as a verb: Hey baby, let's codex
Codex as an adj.: This his head was codex shaped.

A codex can also be used to curse something. Instead of saying "Fuck you!", one may say "Codex you!"
by Willy H Fo Rizzle February 3, 2008
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