Having large, well-developed muscles.
(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.