A Pervert

1. (dated) One who has been perverted; one who has turned to error; one who has turned to a twisted sense of values or morals.
2. A person whose sexual habits are not considered acceptable.

Synonym: perv (slang)

Antonyms: normophile, convert (religious)

In contemporary usage, pervert is usually understood to refer to a sexually perverted person. Traditionally the word was mainly associated with persons of false religious beliefs.