This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. The backpressure in an internal-combustion engine or a boiler.

n. Powder residue that is released upon automatic ejection of a spent cartridge or shell from a firearm.

n. The effect caused by recirculation into the source country of disinformation previously planted abroad by that country's intelligence service in an effort to mislead the government of another country.

n. 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.

n. An unintended adverse result, especially of a political action.

n. The act of shotgunning (inhaling from a pipe etc. and exhaling into another smoker's mouth).

n. the backward escape of unburned gunpowder after a shot.

n. the backward escape of gases and unburned gunpowder after a gun is fired

n. misinformation resulting from the recirculation into the source country of disinformation previously planted abroad by that country's intelligence service

"In much of the intelligence community, the term blowback is used to describe the unintended consequences that, often after providing support, assistance or aid, develop against ones intended goal or overall interests."

misinformation   

vestpocket    supermachine    hammer-less    lay-offs    8-mm