perverse

adjective

• 1showing a deliberate and obstinate desire to behave in a way that is unreasonable or unacceptable:Kate’s perverse decision not to cooperate held good

• 2contrary to the accepted or expected standard or practice:in two general elections the outcome was quite perverse
• Law (of a verdict) against the weight of evidence or the direction of the judge on a point of law.

• 3sexually perverted: an evil life dedicated to perverse pleasure films depicting behaviour which seemed perverse or deviant were seen as more suitable for private therapy than for public consumption