Onlooker, meddler, interferer, a giver of unwanted advice - especially when watching a card game.
"I watched the bridge for a while," he replied. "Not as a kibitzer, you understand." He glanced at Vivian. "I never interfere in affairs that don't concern me."
Earl Derr Biggers, Charlie Chan Carries On. Amazon
There were four or five checker games going each game had one or two kibitzers.
Emile C. Tepperman, Suicide Squad - Targets For The Flaming Arrows. (EBook version)
There are multiple theories about the role that Mr. Clinton, who declined to be interviewed for this article, is playing in the primaries.
Mr. Mann said that he had been less kingmaker and more ''kibitzer in chief.'' Once a nominee became clear, he said, Mr. Clinton would take the lead in trying to unify the party.
Katharine Seelye, The New York Times, 4 January 2004. New York Times
Still it did remind me of an old joke I was able to reprise for the assembled kibitzers (Q: What has a hundred legs and no teeth? A: The front row at a Daniel O'Donnell concert), and when one fan said "Cliff is part of Christmas, really," it underlined the comforting truth that at least it does only come once a year.
Martin Kelner, The Guardian, 29 December 2003.
Guardian
My Lords, setting up the European monetary system is the greatest economic achievement of the European Union. As a currency union comprising 12 countries and a population of 300 million, and in the process of becoming larger still, it represents a remarkable step forward in economic integration. Much to my regret, although I understand why, we were not in at the beginning and have engaged in continuous sniping since. As kibitzers, we should not wonder that the real players do not take us seriously at all.
Lord Peston, Lords Hansard, 23 June 2005. Lords Hansard