WordWeb Online

1. Squeeze or crush a flat material to make a compact rough ball or fit in a container
   "he scrunched up the letter and threw it";
   - scrunch, crumple, crumple up
    
2. [archaic] Make wrinkles or creases on a smooth surface; make a pressed, folded or wrinkled line in; 'crisp' is archaic
   "The dress got scrunched up";
   - wrinkle [archaic], ruckle [archaic], crease [archaic], crinkle [archaic], scrunch [archaic], crisp [archaic]

Derived forms: scrunched up, scrunching up, scrunches up

Type of: fold, fold up, turn up