unorthodox

Etymology

un- + orthodox

adj

1. Unusual, unconventional, or idiosyncratic.
   November 2 2014, Daniel Taylor, "Sergio Agüero strike wins derby for Manchester City against 10-man United," guardian.co.uk The breakthrough came after 63 minutes as United’s unorthodox defence desperately tried to hold off a spell of sustained pressure.
   A driving teacher in China is using an unorthodox method to get his students to drive with more care. He calls it the “fatal blow” method. Basically, students have to manoeuvre the car with skill or risk crushing their smartphones... or those of their classmates. 04/18/2018, “Chinese driving school makes students put phones on line”, in AP News, archived from the original on 2018-04-18