Just caught that! In my case it's a mondegreen of "ja guru debu" from John Lennon's "Across the Universe," which seemed an appropriate source for an email handle at the time.
By clicking on the User Name, you will requery the forum for that user. You will see everything that he or she has posted with that Mudcat name.
By clicking on the Thread Name, you will be sent to the Forum on that thread as if you selected it from the main Mudcat Forum page.
* Click on the linked number with * to view the thread split into pages (click "d" for chronologically descending).
By clicking on the Subject, you will also go to the thread as if you selected it from the original Forum page, but also go directly to that particular message.
By clicking on the Date (Posted), you will dig out every message posted that day.
sj