"The word TERF (or terf) is a slur that is used predominantly by transgender activists and their allies against people who criticize the transgender movement on the basis of feminist concerns. Since the slur is used for people with feminist concerns, the main target tend to be women. As such, it's usually understood to be an anti-feminist, sexist and misogynist slur."
It's a slur? No, it's a description. You don't own feminism. People who accept transwomen can be feminists. In fact, your tranphobic bigotry seems pretty *anti*-feminist to me. In fact, by treating transwomen like freaks because of their sex/gender, I believe it you who is the sexist here. Also, where's your concern about transmen "invading" men's spaces? That's like double sexism, right? So, I guess terfs are anti-feminist, sexist, and misogynist (well, you do seem to hate a lot more women than non-transphobes). Well, let's face it, for people like you feminism means "men are evil" so let's add misandry to the list. Not looking too good, huh?
"The word was invented as an acronym for Trans-Exclusionary Radical Feminist, where the "trans-exclusionary" part referred to those holding roughly the position that transwomen should not be included under a feminist definition of womanhood, and the "radical feminist" part was meant neutrally, i.e. for people who would indeed describe themselves as radical feminists in the true sense. Over time, the acronym pretty much became a four-letter word."
It's a bad word because you're bad people. Feminists who aren't complete dicks realized that a definition of womanhood that excludes transwomen is stupid and evil. So, why don't you pull your head out of your ass and stop being such a dick.
"The "trans-exclusionary" part may now refer to anyone who thinks transwomen should not have unfettered access to all female-only spaces (e.g. changing rooms), should not partake in women's sports where they have unfair advantages, should not be considered a natural part of the lesbian dating pool, etc."
So it refers to people who want to exclude transwomen. Why do you have a problem with an accurate label? Oh, yes, because you think it's redundant since only people like you are True Feminists. Right. You are stupid bigots and the real true feminism has left you behind. It's the F in TERF that is inaccurate. Transwomen are women and we belong in all of those female-only spaces. Asking us to use male spaces is more than insulting. It puts us in danger. I don't really know enough about the sports thing to respond. But, certainly you can let individual lesbians decide which women fall into their natural dating pool?
"Although most members of the public would see these as rather sensible positions, considering a "transwoman" may have intact male anatomy, transgender activists nevertheless see all of these types of "exclusion" as unacceptable."
A TERF appealing to popular opinion? Wow. A lot of (most?) TERFs seem to be lesbians. This person is surely either a lesbian or someone who is supportive of lesbians. Was treating lesbians like freaks OK when that was popular? Is it OK where it's popular today? There's a reason why LGB is followed by T you Glob-damned fucking moron. The hatred that mainstream bigots have for you is exactly the same as the hatred they have for me. BTW, so what if a transwoman has intact male anatomy? Unless I'm having sex with you what I've got between my legs is none of your business. But don't pretend like me getting a sex reassignment surgery would change how you feel. I've read how you guys feel about those "neo vaginas" (Off topic: I think a The Matrix reboot with a female Neo would be cool).
All this boils down to is, "I think penises are gross and anyone who has or had one is icky!"