BIT HORSE is a term used to describe a horse that has been trained to respond to commands given by a bit. The bit is a metal bar placed in the horse's mouth and is used to control the horse's movements. OAT is a type of grain that is commonly used as feed for horses. NEIGH is the sound that horses make when communicating with each other. DROP is a type of bit that is designed to be dropped from the horse's mouth when the rider wants the horse to stop.