[qt.bangerang]

This is where I got the class of Jonin from http://asianhistory.about.com/od/war...njaProfile.htm
I don't think that it is exclusively a Naruto term.

Quotes from link:

Some of the ninja leaders, or jonin, were disgraced samurai like Daisuke Togakure. They had lost in battle or had been renounced by their daimyo, but fled rather than committing ritual suicide.

The ninja "high man," or jonin, gave orders to the chunin, "middle man," who passed them on to the genin, ordinary ninja.