triggerwoman

From trigger +‎ woman.

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triggerwoman (plural triggerwomen)

1. (US slang) A female gunman.
   • 2011, Judkin Browning, Shifting Loyalties: The Union Occupation of Eastern North Carolina, page 75:

     Again, Union men arrested not just the triggerwoman, but the men in the house as well, holding them equally accountable for the actions of anyone in the household.