Someone who suddenly bisexual due to wanting to "fit in".
Girl 1:"Yea, i'm bi."
Trendy bi: "OMG ME TOO! But I was also straight yesturday!"
by Dicksniff. September 16, 2004
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Straight person who finds out it's cool to be out of the ordinary, so decides to call themselves bisexual. Usually teen.
Girl 1: I went to a party last night and kissed a girl.
Gril 2: OMG, that's so cool!
Girl 1: Yeah, I think I'm bi.
by Sonja K. May 22, 2005
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a girl or guy who suddenly starts being bisexual when they were straight before. Usually it's a preppy loser who "becomes" bi because it's suddenly the new trend
Max Imus Gluteus is a trendy bi
by Bum Bum Kim August 7, 2004
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To add to these several definitions that are all stating the same thing...

While it is known that many "trendy" bisexual's only do it to fit in, not much is known about the "average" (lol, irony?) trendy bi group.

Usually consisting of "angst ridden" teens between the ages of 13 and 18, they've, for the most part, died their hair black and resemble your stereotypical goth. Most of them will believe that being in this group, being "bi" makes them different; original, even.

However, the hypocrisy here is so thick that it can be cut with a knife.
The real hypocrisy comes in the form of the name. "trendy." To become bi was, for these people, a way to fit in with the "cool" kids. Of course, these people would rather die before calling themselves "cool." That would only defeat the purpose. Instead, the group as a whole calls themselves anything else. Typically outsiders, or loners, when really their "bi" clique (which, at this point, no longer accepts new "bi" people) has amassed numbers resembling a small night club. What was once a small group of trendy posers in denial becomes a club of them, and nobody wants that.

It especially sucks when one of your friends goes "bi," but instead of still being your friend joins the "bi" kids and all but ditches you.

Of course, while this might not apply to all groups (read: yours) it is certainly true for the vast majority. And if you happen to be in one and think it isn't true, ask yourself: When was the last time you saw a new face in your group? If you can't remember, then congratulations! You've become a trendy clique, you stupid hypocritical bastard.

And don't try getting new members just to prove me wrong. That just makes you worse. Bitch.
Just attempting to expand a bit on this definition of "trendy bisexual."
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Its A stupid excuse for a fad. All the ugly scene and emo kids do it. Its SOOOO fucking annoying when someone you know goes "bi" in a day. Shit
Changing the orientation status to bisexual on all ur profiles.

Thinking its cool to be half gay.

>trendy bisexual
by HERMAINE February 6, 2009
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