nuclear option

Etymology
From analogy with the political decision to be the first to use nuclear weapons in a war.

Noun

 * 1)  In resolving a problem, the possible course of action that is considered the most extreme because of its collateral consequences.
 * 2)  A procedure by which the United States Senate can decide any issue with a simple majority, rather than the usual supermajority.
 * 1)  A procedure by which the United States Senate can decide any issue with a simple majority, rather than the usual supermajority.
 * 1)  A procedure by which the United States Senate can decide any issue with a simple majority, rather than the usual supermajority.