What is "pantomime horse"

n. A comic theatrical representation of a horse, portrayed by two actors in a single costume who cooperate and synchronize their movements.

A pantomime horse (there are also pantomime cows and other animals) is a theatrical representation of a horse or other quadruped by two actors in a single costume who cooperate and synchronize their movements. One actor plays the front end, including the horse's head and its front legs, in a more-or-less upright posture and with a reasonable field of view afforded by eye holes in the horse's head. The other actor, playing the rear end of the animal, must bend at the waist so that his torso is horizontal like that of a horse, and put his arms around the waist of the first actor. He can see little, although there are normally eye holes in the bottom part of the horse's torso to enable him to see where he is putting his feet and to enable him to breathe. Pantomime cows also usually have comically prominent udders.