Free Life?

In Dan Wilson's "Free Life", he notes that 'we got these lives for free'. He also asks, "What you gonna spend your free life on?" Is he simply making a play on words or does he take it for granted that we are free? Also, as we read the Van Inwagen, it is further clarified that "free will" (according to the Free Will Thesis) simply means the ability to have acted other than you did act. What other definitions for "free will" are there?