Equivalent to punk'd.
In reference to Robert, Count of Artois who regularly pranked his guests in middle ages France.
*After spraying water up a lady's dress*
Count: Alriiiigght!YEEAAHH!!! Wooooo!Haha! You've been Artois'd!!
Count: You've been Artois'd!
Lady: What do you mean???
Count: I mean you've been Artois'd!
Lady: who are you????