noun
hulk
HUHLK/hʌlk/
A large cumbersome body or structure.
This hulk of a sofa gets stuck in the narrow doorway.

Etymology
Old English hulc named a light, fast ship, but its Middle English descendant could mean a heavy, unwieldy vessel. That bulky ship image connects it to a large, clumsy person or thing.
In context
A black dog Doesn t seem right no dog s that fat... Looking straight down from the high treetops, I couldn t get a clear picture, just a dark, murky hulk of a back.
More examples
- Despite being a hulk of a man, he moves gracefully.
- The concrete hulk of the old factory dominates the neighborhood.
- Rusted hulks of abandoned trucks fill the yard.
Forms
hulk · hulks
hulking adjective — Very large, heavy, and awkwardly built.