Tom-bi

A gender non-conforming bisexual woman. Kind of like a butch lesbian, but bisexual. May have short hair, wear men's or men's-style clothes, be unshaven, or any or none of the above.

Girl 1: Hey, check out that cute girl over there in the basketball shorts. Is she gay?

Girl 2: No, she swings both ways. She's a total tom-bi.