built like a brick shithouse

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective Australia, Canada, US, simile, colloquial, mildly vulgar (of an object) Exceptionally well constructed; strong or tough.
• adjective Australia, Canada, UK, US, simile, idiomatic, colloquial, mildly vulgar (of a man) Having a muscular body, particularly with well developed muscles of the chest, arms and abdominals.
• adjective Canada, US, simile, idiomatic, colloquial (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.