noun
- nonsense; rubbish: What they say is blah.
- the blahs, a feeling of physical uneasiness, general discomfort, or mild depression; malaise: After the long weekend many workers had the Monday-morning blahs.
adjective
- insipid; dull; uninteresting.
noun
- worthless or silly talk; claptrap
adjective
- uninteresting; insipid
verb
- (intr) to talk nonsense or boringly
“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.