Dupe/duːp/ Definition 1 of 3Pro Tip 1/3Negative Connotation Using 'dupe' as a noun implies a negative view of the person, suggesting gullibility. Investors were portrayed as dupes in the Ponzi scheme scandal. Pro Tip 2/3Being Tricked 'Dupe' indicates someone fell for a trick, not just made a simple mistake. After the email scam, she felt like such a dupe. Pro Tip 3/3Often Deception-Related The term 'dupe' commonly appears in contexts involving deceit, scams, or frauds. The movie's hero was a dupe caught in a web of lies.