stairs at the back of a house, as for use by servants.
a means of intrigue.
back•stairsPronunciation: (bak'stârz'), [key]
associated or originating with household servants.
secret, underhanded, or scandalous: backstairs gossip. Also,back'stair'.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.