'scrunch up' definitions:

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" [syn: squat, crouch, scrunch, scrunch up, hunker, hunker down]

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" [syn: wrinkle, ruckle, crease, crinkle, scrunch, scrunch up, crisp]