Bloviate: To discourse at length in a pompous or boastful manner.
Source: The American Heritage® Dictionary of the English Language, Fourth EditionCopyright © 2000 by Houghton Mifflin Company.
I'm going to post a word of the day, with a mind especially toward blog usage. Blogs seem to be an excellent source for evolving slang. When I have time, I'll provide etymologies, particularly when they're funny.
Some of my favorite sources are Ambrose Bierce's The Devil's Dictionary and the New Hacker's Dictionary. And, of course, I'll use samples from the wild as well.