Rick and Adam (and sometimes guests) talk about a variety of things, with as Rick put it - a "Statler and Waldorf vibe". Sometimes serious, often funny, always honest.
Shit Rick Says was started in April 2013 when Adam Emanon started up his own podcast, and was going to have Rick as a guest on it. Rick mentioned he'd been thinking about doing a podcast and so instead of guesting on Adam's show, the two started up something new, and Shit Rick Says was born.
The name is inspired by popular twitter account "Shit my Dad says", and within just a few months has become a cult hit*.
*depends on your definition of "cult"