Originated from the surfing culture to refer to the act of hanging all ten toes off the front of a long board while surfing a wave.
Now refers to the art of kickin’ back and having a chill day.
Responsible Worker: “Man, I am stuck in the office till 9 and the boss just asked me to come in on a Saturday. What are you doing Joe?
Joe: “I am sitting on my porch putting down some frat water…Just hanging ten and living the dream”