Knuckling p. pr. & vb. n. : of Knuckle

Example:
How can I prevent bow legs or Knuckling in a Great Dane puppy?

Taxonomy
knights, Haba, pretend play.

Defination from the web:
Knuckling Knights and Pretend Play at Shop.com. Knuckling Knights from Haba It's rumbling and thumping heavily in the castle. The knights are running...