1. I try to keep my office door closed so that Jim won’t come in. When he does, he talks my ear off and I can’t get any work done.
2. Doug tried to signal me to interrupt his one-way conversation with Rita. It was obvious that she was talking his ear off and he was too polite to end the conversation.

Synonym: bend (someone’s) ear. Compare to: talk a blue streak. Talk someone’s ear off conveys a sense of boredom that may or may not be present in talk a blue streak.