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!
A person who is willing to try anything or any one at least once! Does not mean there gay or a rug muncher, only unless they developed a sexual tendency to same sex play time.