kibitz
verb
[ ˈkɪbɪts ]
• look on and offer unwelcome advice, especially at a card game.
• "Brigham stood behind them, kibitzing"
• speak informally; chat.
• "she kibitzed with friends"
Origin:
1920s: Yiddish, from colloquial German, from German Kiebitz ‘interfering onlooker’ (literally ‘lapwing’).