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1.
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 Baldwin said he was going to move to France. Why is he still in Hollywood?
by desert irishman April 07, 2004