ace up one's sleeve

== English == === Etymology === From the dishonest hiding of a high-value ace card for use during play, e.g. in the game of poker. === Pronunciation === === Noun === ace up one's sleeve (plural aces up one's sleeve) (idiomatic) A surprise advantage of which others are not aware. ==== Synonyms ==== (US) ace in the hole trick up one's sleeve ==== Translations ====