Definition of "transbian"

Our trans meeting at the clinic breaks up, after a discussion about transbians.

2010, Red Jordan Arobateau, Autumn Changes: Part III, page 930

To give an opinionated answer, I'd say no, I do not think that there is a trend toward all transsexuals becoming transbians.

2011, Shannon Leigh O'Shea, Blue Life, Pink Hair: What It's Like Being The Pink Sheep Of The Family, page 186

“So, I'm a butch transbian, so by most standards I'm literally just a cis-het dude-”

2018 March, Valerie Pleasant, “Women Problems”, in Montréal Writes, page 16