Translation of "have sth up your sleeve" - English-Traditional Chinese dictionary

have sth up your sleeve

informal

to have secret plans or ideas

暗中留有一招;藏有錦囊妙計
If I know Mark he'll have one or two tricks up his sleeve. 如果說我還算了解馬克,我知道他總會留著一兩招。

(Translation of “have sth up your sleeve” from the Cambridge English-Chinese (Traditional) Dictionary © Cambridge University Press)