curl up

verb

1. to curl, make curly, shape into curls

   “Rollers are a good way to curl up your hair.”

2. to become curly
3. to coil or shrivel, make into a coil
4. to become coiled or shriveled
5. to shape one's body into a somewhat ball-like shape, with one's legs tucked into the abdomen, especially for cosiness or for protection.

   “curl up with a good book”

   “He smiled a kind of sickly smile, and curled up on the floor.”