built like a brick shithouse

Meaning

Adjective

• Having a muscular body, particularly with well developed muscles of the chest, arms and abdominals.
• 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.
• Exceptionally well constructed; strong or tough.

Origin

• From the figurative extension of the idea that an outhouse is overbuilt if one builds it with bricks.