nagsock
A nagsock is someone who won’t stop talking, like they have a never-ending conversation in their head and won’t let you live.
My dad is a nagsock. He talks about his job even when I’m trying to watch TV.
My sister is a nagsock. She keeps telling me about her crush like it’s the most important thing ever.
My neighbor is a nagsock. He yells at the mailman every single day.