blah blah blah exclamation 2blah-blah-blah noun 1 exclamation2 •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 had hidden them in his snow boots. •A put-down to silence someone who would otherwise not stop talking.Oh blah blah blah. Just be quiet! blah-blah-blah noun1 •Synonym of blah (“nonsense”).‘Enough of your blah-blah-blah,’ Mrs. Gottlob interrupted her, ‘and at least wish something for the birthday child.’ — 1960
