Someone who likes men, women, transexuals and/or transgenders and is willing to "Tri" anything sexually
"I like men, women, and transgenders"
"You must be a tri sexual"
"Im willing to try anything sexually"
"I think I'm a tri sexual"
A person who tries anything sexual at least once!
Are you bi-sexual? No I'm tri-sexual! I'll try anything sexual once maybe more!