1. A girl who is "like one of the guys" or cool to hang out with, but not in a sexual or romantic way.
We're playing football with some bros and fembros.
A female that is considered a bro within a specific group of male bros. Fembros do no feel any attraction towards said group of male bros, they are strictly bros. And bros do not date bros. But the fembro does engage in the occasional recreational sexual talk with bros. And fembros also sell Grade A weed.
When a girl has a lot of guy friends, she maybe be considered a fembro.