The Collaborative International Dictionary of English v.0.48:

bloviate \blo"vi*ate\ (bl[=o]"v[i^]*[=a]t), v. i. [imp. & p. p.
   bloviated (bl[=o]"v[i^]*[=a]*t[e^]d); p. pr. & vb. n.
   bloviating (bl[=o]"v[i^]*[=a]*t[i^]ng).]
   To orate pompously; -- used especially of politicians and
   news commentators. --Frank Rich (N. Y. Times Jan. 6, 1999, p.
   A23) -- blo"vi*a*tor, n. -- blo"vi*a*tion, n.
   [PJC]

         "We've had almost three weeks of lawyers bloviating
         about what the facts in the case are," Mr. Rogan said.
         "Wouldn't it be easier to bring the witnesses?"
                                                  --Quoted by
                                                  Eric Schmitt
                                                  in The New
                                                  York Times,
                                                  Jan 22, 1999,
                                                  p. A15.

WordNet (r) 3.0 (2006):

bloviate
    v 1: orate verbosely and windily