crumple
1. crum.ple \'kr*m-p*l\ \-p(*-)lin\ vb or crum.pling [(assumed) ME crumplen, freq. of ME crumpen] 1: to press, bend, or crush out of shape : RUMPLE 2: to cause to collapse 1: to become crumpled 2: COLLAPSE 2. crumple n : a wrinkle or crease made by crumpling