a term used by the supernatural fandom (especially on tumblr) for all the fandom-related events that took place after the series finale, ending with season 15. given that the supernatural fandom is both very stubborn and active, there are new findings all the time in s16.
Person 1: oh did you hear about the #deancaswedding trending on twitter? that's crazy how the fandom made that up
Person 2: oh yeah, definitely a highlight of spn s16 for me, up there with the canon "y yo a ti, Cas" spanish dub and the Adam Williams tweets