kibitzer (noun)

1. During their candlelit dinner, the kibitzer repeatedly interrupted their conversation to give unsolicited advice on relationships.

2. The kibitzer would often sit in the back of the church and whisper unwanted advice on how to become more devout during the sermon.

3. In the epic tale, the kibitzer took on the role of the mischievous trickster god, offering unwanted advice to the heroes on their quest.

4. In the futuristic world of the novel, the kibitzer was an annoying holographic assistant, constantly providing unsolicited advice to the main character.