Rosinante
/rɒzɪˈnanti/(also Rozinante)
noun
(A name for) a worn-out or out-of-condition horse; a hack, a nag.
Origin
Mid 17th century. From Rosinante, Rozinante (Spanish Rocinante), the name of the horse ridden by Don Quixote in the satirical romance of that name by Miguel de Cervantes.