old-fashioned slang A derogatory and offensive term for a psychiatric hospital or insane asylum. "Nut" is a derogatory slang term meaning "a crazy person." My great aunt Lidia apparently got locked up in a nut factory when she was a teenager because she said she could commune with ghosts. I can't go to the police about it! They'd throw me in the nut factory if I came to them with such an unbelievable story.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.