In a Seinfeld episode George is dating a girl who uses the expression "yada yada yada" to summarize a series of events. Is this phrase common in the american language or was it first used in this episode? In Sweden we have a phrase called "bla bla bla" which I think means the same as "yada yada yada".
Yada Yada Yada is said to have its roots in a hebrew expression and may be more common in the New York area but is recognized throughout North America.
And . . . blah, blah blah . . . is common in North America too.
But the phrases are not used in the same way exactly.
"Blah Blah Blah" is usually used in a negative, insulting manner, when recounting another person's speech in a somewhat demeaning way, such as,. "He told me he went to Harvard . . . blah blah blah - and then he got a great job on Wall street."
Blah blah blah means you are leaving out things HE said to you.
Whereas Yada Yada Yada is used in one's own supercilious speech in a somewhat condescending way, such as, "I went to Harvard . . . yada yada yada - and then I got a great job on Wall Street."
Yada yada yada means you are leaving out things directly to YOUR listener.