How do I politely or wittily (preferably both) tell someone that when I'm talking privately with someone else, I'm not talking to you? It's so frustrating to have someone non-consensually insert themselves and dominate a conversation that they know nothing about.
For context, I was telling my partner how much I loved a show when a person just emerged out of their room and almost demanded one of us to tell them about the show. I can welcome this interest if I wasn't mid-sentence in explanation with another person. But the fact that I was interrupted then commanded to allocate my time and discussion to someone that doesn't have any value to offer me is incredibly annoying. A discussion has to have an equal exchange of respect. How do you handle when there's no incentive to talk with someone who talks over you in a discussion? Who doesn't listen?
The framing of the question was also incredibly rude imo, "what's this show about? And skip the prejudice. I just want to know exactly what the fuck is going on?" No one has to indulge your curiosity, especially when the approach was so abrasive. It comes across as entitled.