Talk about a matter at tedious length; monopolize someone's attention. For example, Aunt Mary is always bending his ear about her financial problems. This term may have come from the much older to bend one's ear to someone, meaning “to listen to someone,” although the current phrase implies a less than willing audience. [Colloquial; c. 1940]
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.