Have an ace up one's sleeve
Meaning
To possess a secret advantage or hidden resource that can be deployed at a crucial moment.
Origin
The origins of "having an ace up one's sleeve" are firmly rooted in the shadowy world of 19th-century card sharping. Before the advent of tight cuffs, sleeves were often wide and loose, providing the perfect, clandestine hiding spot for a player eager to gain an unfair advantage. A skilled cheat could deftly conceal an ace—the most powerful card in many games—within the folds of their clothing. Then, at a pivotal moment, with a subtle flick of the wrist, the hidden ace would be introduced into their hand, turning certain defeat into a winning play. This literal act of deception became a widespread metaphor for possessing a secret, powerful resource, ready to be deployed at just the right time.
Examples
- The politician seemed calm during the debate because he always had an ace up his sleeve, ready to reveal a new policy.
- Even though the team was down by two goals, the coach knew he had an ace up his sleeve with the star player waiting to come off the bench.