antiofficial

anti- +‎ official

antiofficial (comparative more antiofficial, superlative most antiofficial)

1. Opposing what is official.
   • 1974, Michiaki Kawakita, Modern currents in Japanese art:

     In the Meiji era, Japanese yoga circles were more or less unified by the Bunten, but from the Taisho era on, influential antiofficial groups mushroomed one after another.