A Free Spirit is a person, animal, or object that is "free" from all wordly concerns and can act of his own choosing. Free Spirits are relaxed, cultivated, and free.
John: "Jeff, stop licking the car window."
Jeff: "I'm a free spirit"
2. A very blissful and compassionate person who can be oftentimes unpredictable.
3. A derogatory term for a person who prefers a lascivious lifestyle, most often sexually blissful, and unpredictive obnoxious behavior without the consequences for any bad decisions; see "irresponsible".
Friend 2:"I am a free spirit is a quick and easy way of saying that she wants to do what she wants, when she wants, with whom she wants, to include sex, get drunk, and live her life regardless if it's morally hurtful or offensive to you."
Friend 1: "But she told me that she didn't have much experience...?"
Friend 2: "Dude, while you were at work, she blew like 3 dudes in the back of the 7-11."