an ace up your sleeve Meaning in Cambridge English Dictionary
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Meaning of "an ace up your sleeve" - English Dictionary

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an ace up your sleeve

(US also an ace in the hole)
secret knowledge or a secret skill that will give you an advantage
Translations of “an ace up your sleeve”
in Chinese (Traditional) 秘密王牌, 錦囊妙計…
in Chinese (Simplified) 秘密王牌, 锦囊妙计…
(Definition of an ace up your sleeve from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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