kibitz

To make small talk or idle chatter.

Louise and I used to head down to the coffee shop and just sit for hours and kibitz.

His wife Karen listened as John and I kibitzed about our experiences at the University of Oklahoma some 40 years ago.

To give unsolicited or unwanted advice or make unhelpful or idle comments, especially to someone playing a game.

Quit kibitzing! You're giving away my hand!

To watch a card or board game.

[…] stayed in the dorm, although she lived in Brooklyn Heights, and I frequently spent long hours with her, either in her room or at the student lounge, where we drank coffee and smoked cigarettes and kibitzed the never-ending bridge game.

When it was my turn to stay in the office until 11 pm. closing, I kibitzed on their poker games and heard some colorful tales.