Dupe

Part of speech: noun (n.)

One who has been deceived or who is easily deceived; a gull; as, the dupe of a schemer.

Part of speech: verb (v.)

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.