The prosecution's 'trump card' is the evidence linking the defendant to the murder weapon.
The team 'turned up trumps' in the final game and won the championship.
He 'played/used his trump card' during the negotiations.
(..) A little bit later. Is he gonna sleep? Is he gonna sleep? Is he gonna? Yep, out like a light! This sure trumps the "Has he pooped?" series. Ross, we love him, okay? But right now he's just a little fat guy. How excited can we get? (..)1995 TvShow: Friends Title: The One Where Rachel Finds Out Season: 1 Episode 24