Bloviation is a style of empty, pompous, political speech which originated in Ohio and was used by US President Warren G. Harding, who described it as "the art of speaking for as long as the occasion warrants, and saying nothing".

How do you use the word bloviate in a sentence?

For years I have been using the verb bloviate in reference to speaking in an overblown self-importance. It is true, however, that most politicians, and those men who need to please and placate their electors, love to bloviate.

What's a synonym of bloviate?

harangue, mouth (off), orate, pontificate.