Originated from Adventure Time episode: Season 4, Episode 6 Beyond this Earthly Realm; when Ice King makes his monologue into the TV
Its when someone makes a long rambling or speech or some sort that is confusing or pointless, and mostly directed to themselves. It is most often a very trippy speech.
Guy 1: What is the meaning of life, do we all just live to die? What purpose do we specks of grain against the surface of this great blue circle possibly have to with our own fate?
Guy 2: lol wtf bro
Guy 1: oh sorry bro just wizard talking to myself