nagsock
A nagsock is a person who talks your ear off like you're their personal vent machine and won't stop until you're half-dead.
My mom is a nagsock. She called me 12 times before breakfast.
My coworker is a nagsock. He keeps asking if I want coffee, even though I already said no 5 times.
My dog is a nagsock. He barks at the mailman every day like it's a new job.