curled up

simple past and past participle of curl up

(transitive) to curl, make curly, shape into curls
(intransitive) to become curly
(transitive) to coil or shrivel, make into a coil
(intransitive) to become coiled or shriveled
(intransitive) 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.