Trans-Exclusionary Radical Feminists. That group of feminists that claims that trans women aren't really women, as biological determinism is only a fallacy when it used against them, not when they use it against others.
The original concept was developed by two young gay men who value the stories submitted by it's gay male members even though the stories involve female providers.
Terf is a project that has become a source of entertainment for gay tricks in Canada who enjoy the stories about other men's penises more than they enjoy the company of the providers whom they're allegedly "reviewing" for the benefit of their fellow gay forum members.
"I posted my cock's adventures on terf for all the boys to jerk off over"
"I pretend to like women while masturbating over male members' reviews of their own cocks on Terf."
"Try fishhookin him? LOL. You're a class act man. This is the classiest review ever and i found it on terf.ca!"
"Terf.ca is a great resource for the gay community and it's nice to know that
steve/anonanon/bananaman provides a lot of service but his ass isn't fresh or tight like it was when he started in the biz"