Definitions
1.nounNonsense; drivel; idle, meaningless talk.
2.noun(in plural, the blahs) A general or ambiguous feeling of discomfort, dissatisfaction, uneasiness, boredom, mild depression, etc.
3.verbTo utter idle, meaningless talk.
4.adjectiveDull; uninteresting; insipid."Well, the new restaurant seems nice, but their menu is a little blah."
5.adjectiveLow in spirit or health; down."I decided to go exercise rather than sit around all day feeling blah."
6.interjectionAn expression of mild frustration."Blah! Why can't I get this computer to work!"
7.interjection(When spoken repeatedly, often three times in succession: blah blah blah!) Imitative of idle, meaningless talk; used sometimes in a slightly derogatory manner to mock or downplay another's words, or to show disinterest in a diatribe, rant, instructions, unsolicited advice, parenting, etc. Also used when recalling and retelling another's words, as a substitute for the portions of the speech deemed irrelevant."And then he was like, "Oh, my brother's an Internet millionaire, blah blah blah." Like I care!"
8.interjectionRepresenting the sound of vomiting.