have a card up your sleeve
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.
See also: card, have, sleeve, up
Farlex Dictionary of Idioms.
have a card up your sleeve
have a plan or asset that is kept secret until it is needed. BritishSee also: card, have, sleeve, up
Farlex Partner Idioms Dictionary
- a card up (one's) sleeve
- ace up (one's) sleeve
- card up one's sleeve
- have an ace up (one's) sleeve
- have an ace up one’s sleeve
- have an ace up your sleeve
- have an ace/a trick up your sleeve
- have up sleeve
- have/keep something up your sleeve
- trick up (one's) sleeve