1. A general feeling of boredom, dissatisfaction, or low spirits
   "The rainy weather gave her a case of the blahs"

1. Pompous or pretentious talk or writing
   "The politician's speech was full of blah but short on substance";
   - bombast, fustian, rant, claptrap
    
2. [N. Amer] A general feeling of discomfort, boredom, etc.
   "He's been feeling blah all week"

Type of: boredom, ennui, grandiloquence, grandiosity, magniloquence, ornateness, rhetoric, tedium

Encyclopedia: Blah