brinkmanship
The risky strategy of pushing danger to force someone back down.
Brinkmanship is the practice of pushing a dangerous situation to the very edge of disaster to force the other side to back down. The word comes from the idea of going to the brink, or edge, of a cliff: you get as close as possible to falling without actually going over.
During the Cold War between the United States and the Soviet Union, both countries practiced brinkmanship with nuclear weapons. Each side would make threats and aggressive moves, gambling that the other would surrender rather than risk actual war. It was like two people in a standoff, each daring the other to flinch first, except the stakes were terrifyingly high.
You might see smaller versions of brinkmanship in everyday life. When two countries threaten trade restrictions back and forth, each hoping the other will give in first, that's brinkmanship. When someone waits until the absolute last second to finish their homework, betting they can pull it off, they're practicing a kind of brinkmanship with a deadline.
The strategy is risky because it depends on everyone involved staying rational and in control. What makes brinkmanship dangerous is that miscalculations happen: someone might push too far or misread the situation, and suddenly you've gone over the brink into real trouble. That's why most people consider it a reckless way to solve problems, even if it sometimes works.