Stringhalt n. (Written also springhalt) (Far.) An habitual sudden twitching of the hinder leg of a horse, or an involuntary or convulsive contraction of the muscles that raise the hock.
... splint and a corn, and ain't one of my fore fetlocks got a formoses, and my hind legs the stringhalt? ... — Punch, or the London Charivari, Volume 1, Complete • Various