(of a man) Having a muscular body, particularly with well developed muscles of the chest, arms and abdominals.
(of an object) Exceptionally well constructed; strong or tough; overbuilt or overengineered.
(of a woman) Having an athletic or muscular body; often implying also having large breasts and/or an attractive body. "Over built" for the purpose. More effectively, or handsomely built than is strictly necessary.
Having pronounced muscle development through weightlifting, bodybuilding, or other physical exercise.
Having excessive muscle (sometimes with implications of correspondingly inferior intellect).
Ungainly as a result of muscle over-development.