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*
Person 1: Hello bro what is on your phone
Person 2: Just a bunch of tabs
Person 1: Bro are you Tabsexual
Person 2: Yes bro
Person 1: We accept you bro
Person 2: Thanks bro
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.