DupernounSomeone who tricks other people into believing something that is not true.
Being called a duper is not a good thing. It means you are not honest.Examples:The duper told me the sky was green.I don't want to be friends with a duper.The duper tricked everyone into giving him money.The duper said he could fly, but he couldn't even jump high!The duper tricked the whole town into thinking he was a king.The duper tried to sell me a broken toy.