Trickbagger
A shady individual who tends to try to trick people; A person who thinks they are real crafty but usually they aren't. Once you are a trickbagger there is no turning back and everyone will second guess your intentions. The best example of a trickbagger would be the person who tricks and never gets caught. Usually it's only a matter of time...
"Silly girl, you can't trick a trickbagger..."; "I can't believe he did that to me, what a trickbagger!"