A sexual orientation where the individual finds himself or herself sexually exciting. Narcissexuals are commonly autosexual, however they may engage in interpersonal relationships in which their partners play only a supporting role to the narcissexual's infatuation with himself or herself. Egocentrism and selfishness, especially in intimate settings, are major social indicators of narcissexuality. Derived from the Greek myth of Narcissus.
The character Patrick Bateman from "American Psycho" is an interpersonal narcissexual; he engages in sexual intercourse with women because he enjoys watching himself in coitus.
Michael "The Situation" Sorrentino is an auto-narcissexual; he watches himself masturbate in the mirror.
A narcissist is an extremely conceited person, and and a person that is septic is full of toxic waste. A "narcisseptic" is a person that is completely into themselves, thinks of no one but themselves and they are completely full of shit.