brinkmanship
The pursuit of an advantage by appearing to be willing to take a matter to the brink (for example, by risking a dangerous policy) rather than to concede a point.
uncountable
The diplomat accused the other nation's leader of brinkmanship for refusing to redeploy the troops stationed along their nations' shared border.
Where it comes from
From brink (“border, edge”) + -manship (suffix denoting expertise, involvement, or special status in an area).
Adapted from the Wiktionary entry brinkmanship (CC BY-SA 4.0).