You could simply say, 'Let's move on to a different subject. I don't think this one is doing it for me.' But make sure to have a friendly tone when you say it.
Well, you might try something like, 'I'm having a hard time staying engaged with this story. Maybe we could talk about something that's a bit more exciting for both of us?' That way, you're being kind but still getting your point across.
You can say something like 'I really enjoyed that story the first time, but let's talk about something new now.'
You can also joke about it. Say something like 'Dad, that story is like a broken record! Let's hear something different for a change.' Using humor can soften the message and make it more likely that they won't be offended when you ask them to stop repeating the same story.
You could try saying something like, 'I'm really interested, but could we come back to this a bit later?' That's a gentle way to interrupt.
One way is to show a lack of enthusiasm. Don't give them much of a reaction when they start the story. Just say 'Hmm' in a rather flat tone. They might get the hint that you're not into it and stop. Also, you can excuse yourself briefly. Say 'I need to quickly check on something' and when you come back, start a new topic.
You can also try to shift the focus. For instance, 'Your story is great, but I really wanted to share something with you quickly.' Then start talking about a different topic briefly, so he gets distracted from his endless story.
You can directly tell them that such stories are inappropriate and make you uncomfortable. Be firm in your stance.
Another way is to start a new topic that is more concise. For example, 'That's a great story, but I just remembered something really important I wanted to share with you. It'll only take a minute.' By doing this, you shift the focus away from the long - drawn - out story.
You can simply tell them that it's inappropriate. Just be straightforward and say that such stories are not welcome.
One way to figure it out is to notice if their story has inconsistencies or if their body language seems tense or closed off. Also, if they get defensive when you ask for more details, that could be a clue.
If the details seem too good to be true, they might be telling a fish story. For example, if they say they caught a hundred fish in one minute.