To have an ace up your sleeve
Meaning
To possess a secret advantage, plan, or resource that can be revealed at a crucial moment.
Origin
This phrase vividly emerges from the shadowy world of cardsharping and dishonest gambling. In casinos and backroom games, cheaters would often conceal a powerful card—most commonly an ace, the highest-ranking card in many games—in their sleeve. At a critical juncture, they would subtly manipulate the hidden card into their hand, turning the tide of the game with a sudden, unfair advantage. This literal act of deceit soon transcended the card table, becoming a potent metaphor for any secret, powerful asset or plan held in reserve, ready to be deployed when victory hangs in the balance.
Examples
- The new CEO seemed calm despite the crisis, leading many to suspect he had an ace up his sleeve.
- During the negotiation, she kept quiet about the extra funding, saving that ace up her sleeve for when it truly mattered.