yada yada
/ˈjɑːdə ˈjɑːdə/ /ˈjadə ˈjadə/informal (chiefly US )
exclamation
Indicating (usually dismissively) that further details are predictable or evident from what has preceded: ‘and so on’, ‘blah blah blah’.
noun
Trivial, meaningless, or uninteresting talk or writing; chatter.
Origin
1960s. Imitative of the sound of human speech, probably influenced by (or perhaps an alteration of) yatter.