Kirifuda
Kirifuda is a term that can refer to several things, most notably in the context of Japanese culture and games. The most common usage is in playing cards, where kirifuda (切り札) translates to "trump card" or "winning card." This refers to a card of a specific suit designated as being of higher value than all other suits during a particular round of play. The strategy in many card games revolves around judiciously playing one's kirifuda to win tricks that would otherwise be lost.
Beyond card games, the term kirifuda can also be used metaphorically to describe a decisive or ultimate