When a false statement is implied to take advantage of a person's gullibility. The act is carried out as a joke.
(1) The Joker: I was just speaking to George Clooney at the airport.
Victim: Oh really, that's so cool
The Joker: Oh wait no sorry...Taylor Swift
(2) The Joker: There's a new south park episode out
Victim: Oh Brilliant
The Joker: Oh wait...Taylor Swift