They tried to justify with her taking all these other pills and blah blah.
The result, however, was a triple-decker Meh sandwich, slathered with blah.
This week: a Frankenstein play hits London, the blah blah blah life of Keith Richards, and where does yoga come from?
"idle, meaningless talk," 1918, probably echoic; the adjective meaning "bland, dull" is from 1919, perhaps influenced by French blasé "bored, indifferent." The blahs "depression" is attested by 1966.
An expression of disagreement, contempt, etc; bullshit (1920s+)noun
[echoic; but first sense said to be fr French blase´, ''indifferent, bored'']