Blah-blah-blah Definition
bläbläblä
adverb
And so on; et cetera.
American Heritage
interjection
A stand-in for trivial, obvious, or boring content.
I went to go out, but couldn't find my keys, blah blah blah, my toddler hid them in his snow boots.
Wiktionary
Origin of Blah-blah-blah
Imitative of long-winded or monotonous speech
From American Heritage Dictionary of the English Language, 5th Edition
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