scrunch up
     v 1: 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}, {hunker}, {hunker down}]
     2: make wrinkles or creases into a smooth surface; "The dress
        got wrinkled" [syn: {wrinkle}, {ruckle}, {crease}, {crinkle},
         {scrunch}, {crisp}]
Source: WordNet® 2.0