an ace up one's sleeve

idiom

: a powerful and often secret weapon, advantage, etc., that can be used if it is needed
The mayor's popularity among elderly voters gives him an ace up his sleeve for the coming election.

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Cite this Entry

“An ace up one's sleeve.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/an%20ace%20up%20one%27s%20sleeve. Accessed 28 Nov. 2024.

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