duck :
(duk), n., pl. ducks, 1. any of a numerous wild or domesticated webfooted swimming birds of the family Anatidae, esp. of the genus Anas and allied genera, characterized by a broad, flat bill, short legs, and depressed body.

duck :
(duk), n. pl. ducks, 1. an eclectic bunch of men and women: by day they're social workers, graphic artist, schoolteachers, executives, even a member of the coast guard. By carnival, they're Ducks for a day (or two)

~"Times Picayune" 1997