blowback
From Longman Dictionary of Contemporary Englishblowbackblow‧back /ˈbləʊbæk $ ˈbloʊ-/ noun [uncountable] 1 bad results of an action which were not intended We are now suffering the blowback of the terrible foreign policy choices made by the previous president.2 the powder that is sent out when a gun is fired Other inconsistencies included the absence of fingerprints on the gun and of blowback material from the gun blast.