The Collaborative International Dictionary of English v.0.48:

Shirt \Shirt\, v. t. & i. [imp. & p. p. Shirted; p. pr. & vb.
   n. Shirting.]
   To cover or clothe with a shirt, or as with a shirt.
   --Dryden.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Shirting \Shirt"ing\, n.
   Cloth, specifically cotton cloth, suitable for making shirts.
   [1913 Webster]

WordNet (r) 3.0 (2006):

shirting
    n 1: any of various fabrics used to make men's shirts