slang An accordion. Sorry, I gave all of my change to the guy playing the groan-box in the subway station.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
n. an accordion. (see also (squeeze-)box.) Clare is pretty good on the groan box.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.