According to Wikipedia, "Shit Happens" is a common slang phrase, used as a simple existential observation that life is full of unpredictable events. The phrase is an acknowledgment that bad things happen to people for no particular reason.  In this week's episode, Melody and Tray share their recent "shit happens" experience with a broken sewer pipe that caused raw sewage to back up into their home on Father's Day. Enjoy the story that we all can relate to in one way or another.