Someone who is apt to gossip. Janet's definitely an ear-duster—if you tell her you're pregnant, everyone will know by noon.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
n. a gossipy person. Sally is sort of an “ear-duster,” but she’s all heart.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.