Doucker definitions Webster's 1828 Dictionary DOUCKER, n. [See Duck.] A fowl that dips or dives in water. Webster's 1913 Dictionary Doucker Douck"er, n. [From aouck, for duck. See Duck, v ... larger. Called whistler, garrot, gowdy, pied widgeon, whiteside, curre, and doucker. Barrow's golden-eye of America (G. Islandica) is less ...