crinkle up

crinkle up

to wrinkle up. Her nose crinkled up when she laughed.
See also: up
References in periodicals archive ?
Just crinkle up newspaper or aluminum foil firmly as shown in diagram 2.
When the bonds break, the polymers crinkle up and relax.
The low-stressed polymers won't have the same "need" to crinkle up and relax during washing.