Normally meaning Trans Exclusionary Radical Feminist, as in a feminist that excludes trans people, its usage has widened to describe almost anyone that excludes trans people ideologically, so alternatively can stand for Trans Exclusionary Raving Fool to more accurately describe the people it's used to call out.
Not all TERFs are feminists, but all TERFS are fools.
by Jilly Bobsmith December 6, 2020
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a person trans people dont consider to be real women
jk rowling is a terf and not a real woman
by Kitty_funk May 23, 2021
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Stay off my terf or else
by Silly Macin February 10, 2004
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Someone who claims to be a feminist and/or claims to care about women, however actively harms women in the name of "women's rights"

This word can also apply to a group of people who active campaign against the human rights of a heavily marginalized group of people for no fucking reason at all other than some made up perceived threat based on strawmen arguments
Jimmy: I care about women's rights! Therefore I think biological men shouldn't be in women's restrooms!

Reasonable individual with basic human common sense: if you cared so much about women's rights wouldn't you be an activist for their rights in the middle east? What about the wage gap? Sexual assault? Shouldn't you be spreading awareness on that if you cared about them so much? A trans woman minding her own business in the bathroom should be the very least of your made up problems, goddammit Jim you're not a feminist as much as you wish you were, you're just a TERF goddamn

Jimmy: I- uh... SNOWFLAKE GROOMER!!!
by Jeans6818 June 12, 2022
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An acronym that originally stood for 'Trans-Exclusionary Radical Feminist' but many now say it stands for 'Trans-Exclusionary Raving Fool', by virtue of being applied to anybody who actively discriminates against transgender people regardless of their gender or their stance on feminism. Some of the people it applies to have called it a slur being used to try and silence them, and while I don't doubt that it has, in fact, been used as a slur by certain people, it doesn't meet the criteria of being discriminatory to people of a specific skin color, nationality, gender, or sexuality despite claims to the contrary.
Dear TERFs,

I personally find you to be actively detrimental to modern society by virtue of promoting an outdated and, frankly, disgusting ideology. I recommend that you all simply keep your hate to yourselves and just accept that the world is moving forward and maybe even do so yourselves. Or you can choose to live in the past for the rest of your lives while wondering why the only people who want to spend time with you are each other. Your choice, really.

Sincerely, a denizen of the modern world.
by ThatGuyWhoWatchesVideos November 23, 2021
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Trans Exclusionary Radical Feminist. A transphobic person who tries to cover it up with some twisted version of feminism. These people usually make odd claims about how trans women are not real women because they are "stronger" or more "masculine" than cis women. This implies that to be a "real" women, you have to be weak and stereotypical feminine, which doesn't really sound like feminism to me.
Fuck J.K. Rowling; she's such a TERF.
by coveted seed July 24, 2023
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to behave like a terf
Rosie and the gang went out terfing last night.
by aarachna September 15, 2018
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