Also found in: Dictionary.
1. To accumulate many wrinkles, as due to age or some external force. So many people are terrified of wrinkling up as they get older, but I've always seen it as something to embrace, or at least make peace with. I wish this shirt didn't wrinkle up so badly whenever I hang it out to dry.
2. To scrunch, pucker, or draw up into wrinkles. Her nose wrinkled up at the unpleasant suggestion. My granddad's eyes always wrinkled up in the most charming way whenever he smiled or laughed.
3. To form many wrinkles in something. In this usage, a noun or pronoun can be used between "wrinkle" and "up." Please don't just shove these papers into your bag like that—you'll wrinkle them all up! I love taking baths, but the water always wrinkles up my fingers and toes.
4. To draw something up into a bunch of wrinkles; to pucker or scrunch something. In this usage, a noun or pronoun can be used between "wrinkle" and "up." The child wrinkled his nose up when his mother set the food down in front of him. She wrinkled up her eyebrows in an expression of suspicion.
wrinkle something up
to make something get wrinkles and creases. I love the way you wrinkle your nose up. Don't wrinkle up your jacket.
[for something] to draw up in wrinkles; [for something] to become wrinkled. His nose wrinkled up as he smelled the burning pie. The cloth wrinkled up in the intense heat.