duper
n. C1 Advanced US //ˈdupɝ// UK //dˈuːpɐ// duper
n. someone who tricks or cheats another person. You use this word when you want to say someone is a fraud or a liar.
n. a person who deceives or cheats another; a fraud. Often used in the context of being a 'con man' or a 'swindler'.
He was a total duper who stole my wallet.
The con artist was a master duper who managed to fool even the most experienced investors.
In the world of high-stakes poker, a skilled duper can manipulate the odds by reading subtle tells and maintaining a completely impassive expression.
From dupe + -er.