1. A public figure, such as a politician or an actor, who makes outlandish, strident statements on issues, thinking that the average man will care about their opinions.
2. Someone who pontificates about issues of which they are uninformed, yet pretend to be expert.
3. Pompous blowhard, using their celebrity to speak about topics on which they are totally unqualified.
That bloviator Alec Baldwinsaid he was going to move to France. Why is he still in Hollywood?
one who is able to cleverly and effectively make up credible-sounding information off the top of their head with little or no previous knowledge on a to topic, and apply it effectively to busywork