n. one whose gender identity is usually or always female and who has cycled through three or more sexual identities in recent memory -- at one time being straight, then gay, then bisexual, etc., in no particular order.
Debbie's gone through two chicks and one dude and one she-male in the past year. She's turning into a real tresbian.
Someone who is a lesbian times 3 whenever you are in in the 2 feet range you are a Tresbian too . BEWARE you can easily become one they give of a scent so if can smellflee the area.
Guy: Dude look out a Tresbian I could smell it let's go!
Dude: AAHHHHHHHH
Tresbian: =(