knuckling

noun

1. 1. a joint of the finger; esp., the joint connecting a finger to the rest of the hand
   2. the rounded knob formed by the bones at such a joint
2. the knee or hock joint and nearby parts of a pig or other animal, used as food
3. something resembling a knuckle, as any of the projecting, cylindrical parts through which a pin is passed to form a hinge
4. ☆ brass knuckles
5. Archit. the central joint in a gambrel or curb roof

transitive verb knuckled, knuckling