It is a troll posting a straw man of a position while subscribing to the opposite position.
The term originated in TalkOrigins.org where evolutionists pretending to be anti-evolutionists posted inflammatory and ridiculous arguments against evolution.
Loki troll: Evolution is wrong, tobacco is more advanced than humans because it has 48 chromosomes while humans ONLY have 46! (actual "dr." Kent Hovind quote)
Loki troll: I'm an atheist now! Let's go eat babies and murder people at random! I don't have a morality now!