Definitions for scrunch up
squat, crouch, scrunch, scrunch up, hunker, hunker down(verb)
sit on one's heels
"In some cultures, the women give birth while squatting"; "The children hunkered down to protect themselves from the sandstorm"
wrinkle, ruckle, crease, crinkle, scrunch, scrunch up, crisp(verb)
make wrinkles or creases on a smooth surface; make a pressed, folded or wrinkled line in
"The dress got wrinkled"; "crease the paper like this to make a crane"