Beat the blahs What causes this wintertime down-in-the-dumps attitude?
Soaring obesity rates are causing pets terrible problems, says Bisher: heart disease, diabetes, the blahs.
"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+)
[echoic; but first sense said to be fr French blase´, ''indifferent, bored'']