What type of animal is a bronco?

Go Broncos!🐎

Moonlight , You must never have seen, or attended, a rodeo, western movie, or Clint Eastwood's movie "BRONCO BILLY, which is a story about an aging rodeo BRONCO rider who is trying to prove he is still prominent in a younger man's sport while trying to win the rodeo champion belt buckle!

Idk where I’ve heard this, but I have! I watch a lot of movies that have horses involved in them so really this could be the reason! The movie Flash I love that a lot!

I've never heard about this word "bronco" 🤔