scrunch

Short definition from Wiktionary

Verb

1. 1
   To crumple and squeeze to make more compact.
2. 2
   To crumple and squeeze to make more compact: To contract the muscles of one's face so as to draw their facial features together, out of pain, discomfort, uncertainty, etc.
3. 3
   Alternative form of scranch.

Noun

1. 1
   A crunching noise.