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EnglishEdit

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EtymologyEdit

From the game of poker, from the dishonest hiding of a high-value Ace card for use during play.

PronunciationEdit

  • (file)

NounEdit

ace up one's sleeve (plural aces up one's sleeve)

  1. (Britain, idiomatic) A surprise, or unrevealed advantage, or a hidden or secret strength of which others are not aware.

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