What is the meaning of Haunch?

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.

The loin and leg of a quadruped, especially when used as food.

A squat vertical support structure.

A jerked underhand throw.

To provide with a haunch or supporting structure.

To throw with an underhand movement.

Source: wiktionary.org