n. Nonsense; drivel; idle, meaningless talk.n. (in plural, the blahs) A general or ambiguous feeling of discomfort, dissatisfaction, uneasiness, boredom, mild depression, etc.adj. Dull; uninteresting; insipid.adj. Low in spirit or health; down.interjection. An expression of mild frustration.interjection. 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.interjection. Representing the sound of vomiting. See bleah, bleh.