A person who offers unrequested criticism; one who kibitzes.
Did I ask you what you thought about my card hand, you kibitzer!
Neither good nor evil exactly, he is the ultimate catalyst or , a blue-note howl of pain and laughter such as Charlie Parker might have blown. - New York Times review on 'w:Rabbit Redux, Rabbit Redux' by w:John Updike, John Updike, 05/11/71, http://www.nytimes.com/1971/11/05/books/updike-rabbit.html
Etymology: From Yiddish, from Hebrew (kibbutz), a gathering.
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