From the expression "curl up into a ball".

Tag when a character's limbs are brought to the center of their body, balling up their form. Their spine is usually curved forward too.

If the character's spine is curved forward and their head is tucked in toward their legs, tag fetal_pose in addition to curled_up.

Related tags

• holding_both_legs
• hugging_legs
• knees_pulled_up
• shoulder_stand