A plodding horse refers to a horse that moves slowly, steadily, and without much enthusiasm or energy. The term “plodding” often conveys a sense of tiredness or lack of speed, implying that the horse is moving at a slow, deliberate pace. It can also suggest a horse that is working hard but not very fast—essentially, a horse that’s steady but not particularly fast or graceful in its movement.

This term might be used to describe a horse in a more casual or humorous context, or it could be used more critically to highlight a horse that lacks the agility or speed of other horses.