Meaning
When we indicate that what ever is being said or written is repetitive or predictable.
Origin
Advertisement in an August 1948 edition of the Long Beach Independent had used this as:
“Yatata … yatata … the talk is all about Chatterbox, Knox’s own little Tomboy Cap with the young, young come-on look!”
Dory Previn released the album Mythical Kings and Iguanas in March 1971, which included the song Yada Yada La Scala:
Yada yada La Scala
yada yada yada yada yada
Let’s stop talking talking talking
wasting precious time
Just a lot of empty noise
that isn’t worth a dime
Words of wonder
words of whether
should we shouldn’t we
be togehter
Yada yada yada yada yada