Top Definition
1. A bodily posture in which the legs are closely hugged against the body. (Resembles sitting up in a fetal position)
2. A sitting position often made by a petite, blue eyed, curly-haired female. (In colder weather, you may also see the individual covering her legs with a sweatshirt to ensure warmth)
3. A defense mechanism (not defensive measures)
That biddy had activated ball-form!
by ze whopper October 06, 2010
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