If you scrunch something, you squeeze it or bend it so that it is no longer in its natural shape and is often crushed. Her father scrunched his nose Her mother was sitting bolt upright, scrunching her white cotton gloves into a ball. Scrunch up means the same as scrunch. She scrunched up three pages of notes and threw them in the bin I scrunched my hat up in my pocket. if stones, leaves etc scrunch as you walk on them, they make a noisy sound (crunch)