Commiserations, PrincessNutella and other sufferers. I have noticed this for so long that I have made a personal study of it. I offer you:
The Conversation Hogger – this is the person that once they have been passed the conversational baton, never relinquishes it, but drones on and on in great detail about things of absolutely no interest to any other person in the vicinity.
The Conversation Hijacker – this is the person that waits for any small chink in the conversation to ambush it so that they can talk about themselves and their experiences or opinions – at great length.
The Conversation Derailer – you might think that you’re having an interesting talk about something, but this person will intervene and start talking about something that has no relevance to what has gone before, but which happens to be of interest to them.
I agree with other posters that such rudeness invites the same in return. I’m afraid I have reached a stage in my life where I’m not prepared to put up with behaviour like this. Recently a friend and I met up and were looking forward to a lovely alfresco lunch and a proper catchup. We’d only just ordered when along came a couple, neighbours of my friend, who saw us and decided they would join us, which might have been okay had he not been a conversation hogger. On and on and on he went, on and on, and I switched off – the sparrows’ antics in the hedge held far more fascination for me.
Then my friend tried to involve me in what he’d been talking about, and I said something along the lines of: ‘oh, sorry, I didn’t realise we had to join in, I thought we were just supposed to listen to you’, looking right at the Hogger. Total silence round the table until he remembered he had to be somewhere else, and off they went.
Mind you, that was before I read somewhere on here of the person who put their hand up for permission to speak when someone else was talking at them. I thought that was a brilliant approach, and am bearing it in mind if I encounter this again.