Date:  Wed, 1 Oct 1997 18:00:08 -0400
From:  Peggy Smith <dj611[AT SYMBOL GOES HERE]CLEVELAND.FREENET.EDU>
Subject: Re: yadda, yadda, yadda

The term is actually and originally "yaddata yadata yadata". It
definitely goes back to vaudeville and possibly to the early New York
Yiddish theatre. It's sort of "etc., etc., etc."

Peggy Smith