To offer unwanted or meddlesome advice, such as that given by the spectator of a card game.
To chat; converse.
(informal) To act as a kibitzer.
Origin of kibitz
- Yiddish kibitsen from German kiebitzen from Rotwelsch (German underground argot) kibitschen to search (a prisoner), inspect of unknown origin
From American Heritage Dictionary of the English Language, 5th Edition