A trick up one's sleeve
Meaning
To have a secret plan, advantage, or resource that one can use when needed, especially in a challenging or decisive situation.
Origin
The phrase conjures a vivid image from the golden age of stage magic and backroom card games, particularly in the 19th century. Magicians, with their elegant suits and sleight of hand, would famously conceal cards or small objects within their wide sleeves, only to produce them dramatically as a 'trick.' This literal act of hidden preparation and surprising revelation quickly transcended the stage. Similarly, dishonest card players would keep an ace or a key card literally 'up their sleeve,' ready to be introduced into the game to gain an unfair advantage. This potent visual of a hidden resource, poised for deployment, cemented the idiom's meaning: a secret plan or unexpected advantage.
Examples
- The chess master was losing for most of the game, but I knew he likely had a trick up his sleeve to turn the tide.
- Don't count them out yet; the coach always has a trick up his sleeve for crucial championship matches.