It is uni-sexual insult. That can describe a woman as more masculine, or a man as more feminine.
Player 1: Hey guys <3 hope you all have fun and make it a good game :D!
Player 2: Wow...you are such a phanfer...
(directed to a girl)
Girl: Yeah, i love working out, how much do u bench? i bench around 225 on a bad day.
Man: Wow, your quite the phanfer aren't you? Did you have a sex change recently?