A man that surrounds himself with lesbians or females who identify themselves as gay/queer/dyke etc. Many lesbros are unique in their own way. Some may be gay/bisexual/straight etc. There are some fake lesbros also know as faux-lesbros.
Guy 1:Oh man! Look at the guy! What's he doing with all the girls? They're pretty hot!
Guy 2: Is He gay?
Girl 1: No he's a lesbro. Duh.