knuckling Directory References Discover 7 of the World’s Deadliest Plants 7 Everyday English Idioms and Where They Come From 7 Deadliest Weapons in History What Is the Emoluments Clause? Poker Hands Ranked 9 Memorials and Monuments in the United States Who Invented the Internet? Contents knuckling equine disorder Ask the Chatbot a Question Ask the Chatbot a Question Learn about this topic in these articles:description In knuckle“Knuckling” is used to describe a deformity of the leg of a horse caused by a contraction of the posterior tendon of the fetlock. Read More