(be) ace up (someone's) sleeve

Traductions
иметь козырь в рукаве
He always seems to have an ace up his sleeve when negotiations start to go south.
Кажется, у него всегда есть козырь в рукаве, когда переговоры начинают идти не так.
Définitions
To have an ace up someone's sleeve means to possess a secret advantage, resource, or strategy that can be used to gain an edge over others, especially when it is unexpected.
Mots
ace

noun
туз
sleeve

noun
рукав