Also found in: Thesaurus, Idioms.
1. often blah blah or blah blah blah Meaningless or uninteresting remarks.
2. blahs A general feeling of discomfort, dissatisfaction, or depression: "Monday morning Oscar woke up with the blahs" (New Yorker).
1. Dull and uninteresting.
2. Low in spirit or health; down: sat around all day feeling blah.
[Imitative of meaningless talk.]