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Blowback may refer to:

  • Blowback (firearms), 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
  • Blowback (forensics), vacuum effect created in the barrel of a firearm when it is discharged
Media and entertainment
Other uses
  • Blowback (intelligence), unintended consequences of a covert operation that are suffered by the civil population of the aggressor government
  • Blowback, a 2013 spy novel by former United States CIA operations officer Valerie Plame
  • Blowback: The Costs and Consequences of American Empire, a 2000 nonfiction book by Chalmers Johnson
  • Another term for backscatter
  • An aerodynamic phenomenon affecting helicopter rotors also called flap back