A female or male, usually a female though, who claims to either have previously or is willing to currently try any sexual act, at least once. Also called a trysexual.
Male to female: So how do you feel about Menage a trois?

female to male: Well, I'm a tri-sexual, so i'll try anything once! And if i like it...well, then you can just call me a freak.
by Nay December 20, 2004
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A person who switches between being straight, gay and bi-sexual based on their mood and current emotions.
Julie- "Wow, he's really cute."
Anne- "Oh yeah, he is."
~fifteen minutes later~
Julie- "Omigosh. Check out that chick over there!"
Anne- "Wait... I thought you were straight. You're bi?"
Julie- "Nope. I'm just trisexual."
by slayson October 4, 2010
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anyone who tries sex with anything
That trisexual tried to have sex with a tree!
by Tony IBodiducci March 13, 2009
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"A person who likes males, females, and also animals. It doesn`t really make sense, as animals are not a different sex, but it is used this way. This meaning was originally thought up in Union City, California to define a certain male. Can be used to just call someone a name."
1.) "Dude, he`s trisexual."
"What?!"
"Yeah. He broke up with his girlfriend after he treated her like shit. And after all that, she still loved him! Rumor is that he`s bisexual, but then someone saw him touching a dog."
by §ALLY <N.E.R.D> May 23, 2005
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Someone who is attracted to animal, mineral and vegetable. Obviously.
The topic of trisexuality in sex ed classes is banned in 49 states.
by bankholiday June 20, 2006
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A deviant with a boundless sexual appetite. First appearing in the 1984 Cheech and Chong film, "The Corsican Brothers."
"He's trisexual!"
"Trisexual?"
"Yeah, he'll try anything: goats, chickens, dogs...dried up pieces of pottery"
by Evil W June 13, 2007
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sort of like bisexual, except it is when one likes males, females, its or shemales.
bob: "dude i sucked my girlfriends dick last night"
jack: "WHAT THE FU..."
bob: "-WHAT!? im trisexual
jack: "well i guess that explains the chick, dude, and it u slept with last week."
bob: "yup."
by Mr. Jack Off July 6, 2009
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