A female that uses her sexiness/genitals to persuade, entice, manipulate, coerce, and mindfuck men into doing her every bidding, wish, and whim for even the thought of sexual intercourse.
However, despite the negative connotations associated with this word, a women may use her sexciopathic tendencies for good over evil. Although this usage is rare and may occur once in a sexciopath's life.
Kyle: "Dude check that girl out, she's hot as hell!"
Omar: "Stay away from Rabbit man, she's a sexciopath."