Backfire
Part of speech: noun
Definition: A small, controlled fire set in the path of a larger uncontrolled fire, in order to limit the spread of the large fire by removing its fuel.
Part of speech: verb
Definition: (Of a gun or cannon) to fire in the opposite direction, for example due to an obstruction in the barrel. To fail in a manner that brings down further misfortune.
Blowback
Part of speech: noun
Definition: A type of action where the pressure from the fired cartridge blows a sliding mechanism backward to extract the fired cartridge, chamber another cartridge, and cock the hammer.An unintended adverse result, especially of a political action.The act of shotgunning (inhaling from a pipe etc. and exhaling into another smoker's mouth).