" Ace in the hole "
Meaning:
A saved, hidden advantage that can supply a victory when revealed.
Example:
Pete Townshend thought ’I can see for miles’ was a sure-fire hit and he saved it, as an ace in the hole, until he needed to boost the group’s success.
Where did it originate?:
Where is it used?:
Used worldwide, but not commonly so.
Hear the idiom spoken: