slang Prison. If you keep getting into trouble like this, you're going to end up going to Graystone College one day.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
See Graybar Hotel
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.