contumacious[kän′tyo̵̅o̅ mā′s̸həs, -tə-]
An example of contumacious is someone who will absolutely not wear a seat belt because they don't like to be told what to do.
Origin of contumacious; from contumacy + -ous
(comparative more contumacious, superlative most contumacious)
From Latin contumāx (“stubborn, obstinate”)