pinking, n.
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The act of piercing or stabbing. [1913 Webster]
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The act or method of decorating fabrics or garments with a pinking iron; also, the style of decoration; scallops made with a pinking iron. [1913 Webster]
Pinking iron. (a) An instrument for scalloping the edges of ribbons, flounces, etc. (b) A sword. [Colloq.]