Source : Webster's Revised Unabridged Dictionary (1913)

Shirr \Shirr\, n. (Sewing)
   A series of close parallel runnings which are drawn up so as
   to make the material between them set full by gatherings; --
   called also {shirring}, and {gauging}.

Source : WordNet®

shirr
     v : bake (eggs) in their shells until they are set; "shirr the
         eggs"