The title is a reference to Hasbro's Wizards of the Coast tabletop role-playing game Dungeons & Dragons, which has been partnered with through merchandise[2][3] and has had two in-universe counterparts—Oubliettes & Ogres and Dragons & Dragons—introduced in the IDW comics.
When the Mane Six leave town, Discord joins Spike and Big McIntosh's top-secret "Guys' Night" of fantasy role-playing.