Ace in the hole.
[Idiom] ACE IN THE HOLE. - Revealing Hidden Advantages
A hidden advantage.
'Ace in the hole' signifies a hidden or secret strength, or an advantage that can be revealed at a crucial time for maximum effect. Originally from poker terminology, it implies having a resource kept back to be used strategically when most needed.
Example Sentences
Her secret ingredient is her ace in the hole for the cooking contest.
Her secret ingredient is her hidden advantage in the cooking contest.
In negotiations, the company had an ace in the hole they hadn't revealed yet.
In negotiations, the company had a hidden advantage they had not yet revealed.
For the competition, he kept his aces in the hole until the final round.
For the competition, he kept his hidden advantages until the final round.