oncebian 

A woman who is in a lesbian relationship for a while but realizes she is not a lesbian.

Lindsey Lohan is totally a oncebian, she'll leave Samantha for a man soon!

oncebian by LaraAnn December 9, 2008

Oncebian 

Originated from the hit TV show "Greys Anatomy", meaning "to be a lesbian once"

Also "Twicebian" meaning "to be a lesbian twice"

Yang: It wasn't like she was your girl friend...Oh, so you're a lesbian?
Mcsteamy: More like a oncebian
Kally: Or maybe a twicebian, I dont know.

Oncebian by Greyfan1 March 30, 2009