Pink"ing, n.
1.
The act of piercing or stabbing.
2.
The act or method of decorating fabrics or garments with a pinking iron; also, the style of decoration; scallops made with a pinking iron.
Pinking iron. (a) An instrument for scalloping the edges of ribbons, flounces, etc. (b) A sword. [Colloq.]
© Webster 1913.