an ace up your sleeve
US /ən eɪs ʌp jʊər sliːv/
UK /ən eɪs ʌp jʊər sliːv/
1.
as w rękawie, ukryta przewaga
a secret advantage or resource that can be used when needed
:
•
The politician had an ace up his sleeve for the debate.
Polityk miał asa w rękawie na debatę.
•
She always keeps an ace up her sleeve for negotiations.
Zawsze ma asa w rękawie do negocjacji.