Definitionen
1.NounNonsense; drivel; idle, meaningless talk.
2.NounA general or ambiguous feeling of discomfort, dissatisfaction, uneasiness, boredom, mild depression, etc.
3.NounA fool, an idiot.
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."Yeah, yeah, blah blah blah, Mom, you said this all yesterday.; And then he was like, "Oh, my brother's an Internet millionaire, blah blah blah." Like I care!"
8.InterjectionRepresenting the sound of vomiting.
9.VerbTo utter idle, meaningless talk.