verb (used with object), duped, dup·ing.
Origin of dupe1
Related formsdup·a·ble, adjectivedup·a·bil·i·ty, noundup·er, nounun·dup·a·ble, adjective
Examples from the Web for duper
Come to find out it was the proprietor's wife, Mrs. Duper, an old mexican lady, who had been watching our maneuvers.A Texas Cow Boy|Chas. A. Siringo
The Beau tried to preserve his dignity, and throw over his duper, but in vain.The Wits and Beaux of Society|Grace Wharton and Philip Wharton
As a dupe was shown above, now the duper is signified, by Fig. 110.