Definition:
A "trump card" is originally a term from card games. It refers to a card that is more powerful than others in the game because it has been declared as "trumps." In a broader sense, it means a special advantage or resource that someone can use when they really need it.
In Card Games:
In Everyday Life:
In more complex discussions, "trump card" can refer to a hidden strength or strategy that someone holds back until it is the right moment to reveal it.
In a non-gaming context, "trump card" can also refer to any advantage that can decisively influence an outcome. It is often used in business, politics, or personal situations.
While there are no direct idioms or phrasal verbs specifically related to "trump card," phrases like "pull out all the stops" can mean to use all possible resources or advantages in a situation, similar to using a trump card.
In summary, a "trump card" is a powerful advantage that can help someone win or succeed in a competitive situation, whether in games or real life.