I came across this lovely word today in Peter Hitchens' blog in The Sunday Express. To quote:
Now agree or not with Hitchens - I'm a fan as I like someone who will speak truth even if it is unpopular (so rare these days) - I love the use of the word which, to my shame, I'd never heard before. Bloviate. To bloviate. It's kind of a semi intellectual version of 'to bullshit'. Checking my Wikipedia, I notice that it comes from Ohio politics of the late 19th and early 20th century and means empty or vapid political speeches that essentially say nothing of substance.
How very apt in these shallow days! I shall endeavour to use this marvellous word from now on and if you think this is another example of Robson bloviation, then re-read my sentence!