From Wikipedia: "Bloviation in Ohio was originally idle chatter. As a form of political speech, it appears in the
Debates and Proceedings of the Convention for the Revision of the State of Ohio in the mid 19th century. One etymology suggests that the word is a "compound of blow, in its sense of 'to boast' (also in another typical Americanism,
blowhard), with a mock-
Latin ending to give it the self-important stature implicit in its meaning."
Currently, bloviation is not observed here because the leadership does not know any 'big' words; what we hear is more like the definition given by journalist H. L. Mencken: "It is a kind of baby talk, a puerile and wind-blown gibberish. In sound it is like a rehearsal by a country band, with only the bass-drummer keeping time. In content it is a vacuum."