Dupe (?), n. [F., prob. from Prov. F. dupe, dube; of unknown origin; equiv. to F. huppe hoopoe, a foolish bird, easily caught. Cf. Armor. houp'erik 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.
© Webster 1913.
Dupe, v. t. [imp. & p. p. Duped (?); p. pr. & vb. n. Duping.] [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.
© Webster 1913.