Indie as fuck. Used primarily when something describes the activity of a hipster
or is otherwise fits into the life of a stereotypical, trendy twenty-something who would fit in in Portland, the East Village, or Brooklyn. Sometimes describes quirky or untraditional behavior.
Can also be used to describe art or images (primarily photographs) that have a hipster
Usually used as self-depreciating humor, or ironically.
Person #1: My local non-corporate coffee shop just started using fair-trade single-origin beans roasted by that new independent roaster in the Bowery!
Person #2: IAF.
Person #1 shows a grainy black and white, out of focus, overexposed photo of one of their friends at a party.
Person #2: That's IAF.