Omnisexuals are attracted equally to all human beings (men, women, transexuals, etc.) They tend to go through phases of gender attraction that switch frequently and will eventually settle down with whoever wins their heart, regardless of said person's gender.
not to be confused with the heralded Omnisexual: one who distributes his/her sexual affection in and around the Atlanta area esp. near the Omni arena and recently any other arena in the area
"Dude, that lamp post is so sexy."
"You know what I've always found really attractive? String Theory."