ROT13, for those who don't know, is a simple method of encoding text which consists of replacing letters by letters 13 places away in the alphabet. So "Monk", for example, becomes "Zbax".

ROT13 is a popular encoding for text that is intended to have some minimal level of protection against accidental reading, without actually preventing anyone who wants to read it from doing so, such as movie spoilers. It's convenient because if you apply ROT13 to a ROT13 encoded text, you get back the original text - so you only need a single algorithm for both encryption and decryption. Of course, it has become popular enough that certain people of a certain level of geekiness can now simply read ROT13 text without even bothering to decode it.

In a bizarre twist, "Monk" in ROT16 is "Ceda". Maybe Qui-Gon knows more than we think...

Transcript

Obi-Wan: You still haven't explained how you came up with the name "Jedi".
GM: Um...
Qui-Gon: "Jedi" is just "Monk" in ROT13.
Obi-Wan: Nah, that'd be... um...
R2-D2: "Zbax".
Obi-Wan: You're a freak.
Yoda: Ahem. Discussing the boy we are.
Yoda: Injected him with midi-chlorians you did. Very bad this is.
Qui-Gon: Why?
Obi-Wan: I've been thinking about that. Logically, it would be a sensible way to create more Jedi knights.
Yoda: Centuries ago, tried this people did, but dangerous it was. Mentally unstable many of the recipients became. Turned to evil some did.
Obi-Wan: Hmmm, okay, that would explain why it's not done any more.
Yoda: Only in a few cases did it work, but bad side effects there were.
[SFX]: twitch {Yoda twitches}
Yarael Poof: Preach it, brother.