A person or animal that ducks, or someone who avoids responsibility or danger by dodging or hiding.
From 'duck' (the action of lowering one's head quickly) plus the agent suffix '-er.' The word developed from the literal physical action to mean someone who habitually avoids things.
In some dialects, calling someone a 'ducker' was actually an insult suggesting cowardice—but in sports, a good 'ducker' (someone skilled at dodging) might be celebrated for their agility.
Complete word intelligence in one call. Free tier — 50 lookups/day.