Naggerdomis
The person who doesn't just nag, they nag you until you're ready to throw your phone out the window. They’re not a nagger. They’re a naggerdomis. And they’re not going anywhere.
'I’m not nagging you. I’m just making sure you know I’m nagging you.'
'You’re not ignoring me. You’re just pretending you’re not ignoring me.'
'If you don’t reply, I’ll come to your house and nag you in person.'