A ladies' restroom. Janie went to the gab room—she'll be back in a minute.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
n. a women’s restroom where women are said to chatter. She went to the gab room to powder her nose.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.