Piaffer is a French term that refers to a dressage movement where the horse performs a series of small, lively steps while remaining in place. The term is commonly used in the equestrian world, particularly in competitions, and is considered a difficult movement to master. There are several synonyms for piaffer, including "trot on the spot," "jog in place," and "pacing in position." Other similar terms used for this movement include "passage," "piaffe and passage," and "Spanish walk." The use of synonyms for piaffer can vary depending on the context in which the dressage movement is being used.