The backpressure in an internal-combustion motor or a boiler.
Powder residue that's released upon automatic ejection of a spent cartridge or layer from a firearm.
the end result brought on by recirculation to the supply country of disinformation previously grown overseas by that nation's intelligence solution so that you can mislead the government of another country.
An unintended adverse result, particularly of a political activity.
The act of shotgunning (inhaling from a pipe an such like. and exhaling into another smoker's lips).
the backward escape of unburned gunpowder after a shot.
the backward escape of gases and unburned gunpowder after a gun is fired
misinformation caused by the recirculation to the source country of disinformation previously planted abroad by that country's cleverness service