A chick who likes, or loves, a transman.
It's a mix of the word straight and lesbian.

Stra-sbian

This is because a transman is, by gender, a male. But often still has female genitals. So a girl who likes a transman could be considered both straight and lesbian.
Dude! Jenny is such a strasbian!
What? I thought Max was a chick?
Nah! Max is a transman!
by RileyButt June 20, 2011
Get the Strasbian mug.