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.
That trysexual guy just had sex with a hermaphrodite that was became a man, then a woman, then he screwed a brick with a gerbil in his ass while riding a bike on a high-wire over San Francisco gay parade dressed like a dead ballerina.
noun: a person who is willing to and/or has tried anything sexual anyone can think of with any other person or animal or inanimate object male or female
Todd: Dude, did you see Pete eating out Jimmy's ass?
Earl: Yeah, like, he's a total trysexual!