Dunker (Noun) — An eater who dips food into a liquid before eating it. ex. "he was a dunker--he couldn't eat a doughnut without a cup of coffee to dunk it in"
Dunker (Noun) — A basketball player who is able to make dunk shots.
Dunker (Noun) — An adherent of Baptistic doctrines (who practice baptism by immersion).