muff pistol

Noun

 * 1)  A small flintlock or percussion gun, usually for women, which can be hidden in a muff hand-warmer.
 * 2) * 2006, Elisabeth Israels Perry and Jennifer Ann Price, expanatory note for An American girl, and her four years in a boys' college by Olive San Louie Anderson, page 203:
 * A century earlier [than the 1870s], women in dangerous professions, such as tending bar or prostitution, carried a “lady's muff pistol.”