fly the freak flag

(idiomatic) To behave in a unconventional or unrestrained manner; to exhibit the uninhibited side of one's personality.

Example: 2002, Mark Morford, "Girl With The Toaster Tattoo," San Francisco Chronicle, 3 Jul. (retrieved 26 Aug. 2008),
  What she realized, in short, is she could go with her funk and quirk, be who she was and fly the freak flag high.