play (one's) trump card

(redirected from play their trump card)

play (one's) trump card

To use a particular stratagem or resource that will give one a distinct advantage over others, often by being held and then used at an opportune time. I have a feeling the prosecution still hasn't played their trump card in this trial—I'm expecting a big revelation during tomorrow's testimony. I was looking like I would get full custody of the kids, but then Mary played her trump card—pictures of me going in and out of various women's houses around the city.
See also: card, play, trump

play one's trump card

 
1. Lit. [in certain card games] to play a card that, according to the rules of the game, outranks certain other cards and is thus able to take any card of another suit. Bob played his trump card and ended the game as the winner.
2. Fig. to use a special trick; to use one's most powerful or effective strategy or device. I won't play my trump card until I have tried everything else. I thought that the whole situation was hopeless until Mary played her trump card and solved the whole problem.
See also: card, play, trump
References in periodicals archive ?
It's a big gamble for Drive-By Truckers - but the Deep South rockers have dared to play their Trump card on their 11th album, American Band.
If ever his aces needed to play their trump card then this week at the US Open would be ideal.
Chrissie, Sam and Zoe are in the thick of the action as the three spurned women attempt to play their trump card after meeting up at Johnny's new club.
"We said years ago that despite supermarkets having unfair advantages, small convenience stores had still to play their trump card - personal service.
Following a meeting with Scots Industry Minister Gus Macdonald, the team is also set to play their trump card - a government contribution to any rescue plan.