The female version of "Brosef." Used to show close friendship with a chick. Just like a "Sofa", she's the type of girl you could chill and watch the game with. Derived from old-Russian, used to mean "Brosov", or "Brother in Death."
If she's a true "Brahsofa", she'll come and pick me and my drunk friend off the beach up and let us crash at her place.