haunch
(anatomy) The area encompassing the upper thigh, hip and buttocks on one side of a human, primate, or quadruped animal, especially one that can sit on its hindquarters.
And the rabbit from his path-way / Leaped aside, and at a distance / Sat erect upon his haunches.
The loin and leg of a quadruped, especially when used as food.
(architecture) A squat vertical support structure.
(dialect) A jerked underhand throw.
(architecture) To provide with a haunch or supporting structure.
(dialect) To throw with an underhand movement.