Justin actually made this as a way to poke fun at the idea of getting cease and desist letters. At the time October he had nothing to lose and his original intention was to call this "back to the future: the new official universal studios cartoon featuring the new Doc Brown and Marty McFly" and then just sit back and wait for a letter from their lawyers to arrive. That's actually why it's so filthy. He was just looking to "troll" a big studio. Rick moves in with his daughter's family and establishes himself as a bad influence on his grandson, Morty.
In the animated comedy Rick and Morty, a demented scientist involves his grandson in his unwise and dangerous experiments. Morty is a year-old boy who lives with his parents, his sister, and his mother's father. Rick, Morty's maternal grandfather, is an alcoholic mad scientist who insists on being a nonconformist. He's also not very nice. Rick's inventions lead him on adventures through time and space.