perversion

n. deviation, aberration; falsification; distortion

Perversion is a term and concept describing those types of human behavior that are perceived to be a serious deviation from what is considered to be orthodox or normal. Although it can refer to varying forms of deviation, it is most often used to decsribe sexual behaviors that are seen as abnormal or excessive. Perversion differs from deviant behavior, since the latter refers to a recognized violation of social rules or norms (although the two terms can apply to the same thing). It is often considered derogatory and in psychological literature the term paraphilia is now used instead, though this term is controversial.
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Noun
1. a curve that reverses the direction of something; "the tendrils of the plant exhibited perversion"; "perversion also shows up in kinky telephone cords"
(hypernym) curve, curved shape
2. an aberrant sexual practice that is preferred to normal intercourse
(synonym) sexual perversion
(hypernym) sexual activity, sexual practice, sex, sex activity
(hyponym) paraphilia
3. the action of perverting something (turning it to a wrong use); "it was a perversion of justice"
(hypernym) wrongdoing, wrongful conduct, misconduct, actus reus
(derivation) pervert, misuse, abuse

n. perversion, aberration, distortion, state of being intentionally misconstrued

n. perversion, depravity, corruption