DUPE (2)

dupe (2). Dupe, n. a credulous person, one easily tricked

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Dupe, v. t. [imp. & p. p. Duped (dūpt); 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.