= to talk too much to someone

talk someone's ear ( idiom ) talk someone's head ( idiom ) meaning: Talk so much as to exhaust the listener or annoy him/her . examples: if he can get you on the phone, he'll talk your ear off, every time. “You have to stop! You’ve talked my ear off!” so great catching up!!! Sorry to talk your ear off! This lady is nice and all but she will talk your ear off!!!!

continue talking non-stop and perhaps making the other person uncomfortable

Hi, good to see you back here. Another way of saying this is: to rave on and on

Imagine you talked at someone so much that their ear fell off, from exhaustion. That's a lot of talking. ;)