attested from 1580s. duck-walk is 1930s; duck soup "anything easily done" is from 1908. Duck's ass haircut is from 1951. Ducks-and-drakes, skipping flat stones on water, is from 1580s; the figurative sense of "throwing something away recklessly" is c.1600.
"strong, untwilled linen (later cotton) fabric," used for sails and sailors' clothing, 1640, from Du. doeck "linen cloth," related to Ger. Tuch "piece of cloth."
"to plunge into" (trans.), c.1300; to suddenly go under water (intrans.), mid-14c., from presumed O.E. *ducan "to duck," found only in derivative duce (n.) "duck" (but there are cognate words in other Germanic languages, cf. Ger. tauchen "to dive"), from P.Gmc. *dukjan. Sense of "bend, stoop quickly"
is first recorded in English 1520s. Related: Ducked; ducking.