| a miscalculation that recoils on its maker | Blowback is a system of operation for self-loading firearms that obtains energy from the motion of the cartridge case as it is pushed to the rear by expanding gases created by the ignition of the propellant charge. |
| a loud noise made by the explosion of fuel in the manifold or exhaust of an internal combustion engine | misinformation resulting from the recirculation into the source country of disinformation previously planted abroad by that country's intelligence service |
| the backward escape of gases and unburned gunpowder after a gun is fired | the backward escape of gases and unburned gunpowder after a gun is fired |
| a fire that is set intentionally in order to slow an approaching forest fire or grassfire by clearing a burned area in its path | |