dupen.[F., prob. from Prov. F. dupe, dube; of unknown origin; equiv. to F. huppe hoopoe, a foolish bird, easily caught. Cf. Armor. houprik hoopoe, a man easily deceived. Cf. also Gull, Booby.] One who has been deceived or who is easily deceived; a gull; as, the dupe of a schemer.()v. t.[Cf. F. duper, fr. dupe. See Dupe, n.] To deceive; to trick; to mislead by imposing on one's credulity; to gull; as, dupe one by flattery.()Ne'er have I duped him with base counterfeits. ( Coleridge.)