/ djuːp; NAmE duːp/ verb , noun
■ verb
[ vn ] dupe sb (into doing sth) to trick or cheat sb :
They soon realized they had been duped.
He was duped into giving them his credit card.
■ noun
( formal ) a person who is tricked or cheated
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WORD ORIGIN
late 17th cent.: from dialect French dupe hoopoe, from the bird's supposedly stupid appearance.