ducker
/ˈdʌkər/
noun
- A person or animal that ducks or lowers their head quickly, especially to avoid something.
- In the game of dodgeball, being a good ducker is just as important as being a good thrower.
- The rabbit was a natural ducker, hiding in the tall grass whenever a hawk flew overhead.
- The boxer was a quick ducker, avoiding every punch his opponent threw.