have a card up (one's) sleeve(redirected from have a card up our sleeves)
have a card up (one's) sleeve
To have a secret plan, idea, or advantage that can be utilized if and when it is required. A reference to cheating at a card game by hiding a favorable card up one's sleeve. She has a card up her sleeve if they ever try to fire her, since she knows about the boss's unscrupulous business practices.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
have a card up your sleevehave a plan or asset that is kept secret until it is needed. British
Farlex Partner Idioms Dictionary © Farlex 2017