The Collaborative International Dictionary of English v.0.48:

Crumple \Crum"ple\ (kr[u^]m"p'l), v. t. [imp. & p. p. Crumpled
   (-p'ld); p. pr. & vb. n. Crumpling (-pl[i^]ng).] [Dim. fr.
   crump, a.]
   To draw or press into wrinkles or folds; to crush together;
   to rumple; as, to crumple paper.
   [1913 Webster]

         They crumpled it into all shapes, and diligently
         scanned every wrinkle that could be made. --Addison.
   [1913 Webster]