rubber room(redirected from a rubber room)
slang A room in which the walls are padded. It is typically found in psychiatric institutions, where it houses one who is not mentally stable, in an effort to prevent self-harm. That patient kept banging her head against the wall, so she is now in a rubber room for her own safety.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.