Anyone who is unduly enamoured of the Twilight books/movies. Such individuals are typically characterized by their obsession with Edward Cullen, the main protaganist of the series, and lack any rationality or intelligence when it comes to the subject.
Edward Cullen Look-Alike: Hello.
Twisexual Girl: Oh my God, you look just like him! (immediately bends over)
Edward Cullen Look-Alike: *fap* *fap* *fap*
Edward Cullen Look-Alike: Hello.
Twisexual Guy: Oh my God, you look just like him! (immediately bends over)
Edward Cullen: *fap* *fap* *fap*
Due to contrary belief, trisexuals are not attracted to any living or nonliving thing. Instead, they are only sexually attracted to the tricerotops dinosaur. Most trisexual prefer horns inside of them instead of dicks.
A relation to sexual objects that does not discriminate on any level. One is sexually related to people, objects, and ideas. One feels sexually attracted to all of these things, at different intervals, but not at the same time. It's an alternating frequency of asexuality and pansexuality, not to be confused with either end of the spectrum.