Judge-made

Judge-made \Judge"-made`\, a.
   Created by judges or judicial decision; -- applied esp. to
   law applied or established by the judicial interpretation of
   statutes so as extend or restrict their scope, as to meet new
   cases, to provide new or better remedies, etc., and often
   used opprobriously of acts of judicial interpretation
   considered as doing this. Judge-made law is contrasted with
   {statutory law} and {civil law}.
   [Webster 1913 Suppl. +PJC]

         The law of the 13th century was judge-made law in a
         fuller and more literal sense than the law of any
         succeeding century has been.             --Sir
                                                  Frederick
                                                  Pollock.
   [Webster 1913 Suppl.]