Green’s Dictionary of Slang

1. a feminist, a member of the Women’s Liberation Movement; also attrib.

1972		Eble Campus Sl. Oct. 4: libber – one who believes in women’s liberation.
1972		National Rev. 22 Dec. 1416: Decter’s major charge against the libbies is that, basically, they seek not equal responsibility with men but flight from responsibility.
1978		S. King Stand (1990) 1037: She got dragged along to a couple of female consciousness meetings by her roomie, who was this big libber type.
1981		A.K. Shulman On the Stroll 127: ‘I’ll get you later,’ he hissed menacingly, marking them as dykes or libbers from the way they screamed.
1996		T. Wolff ‘Sanity’ in The Night in Question 78: ‘He was totally selfish, totally out to please himself. That gave him a certain heat. [...] The libbers would kill me for saying this, but it’s true’.
1999		Guardian G2 17 Sept. 15: I know what some of your big-city, no-bra-wearing, hairy naked women’s libbers might say.
2004		L. Redhead Peepshow [ebook] She’d been a women’s libber in the seventies.
2006		D. Mitchell Black Swan Green 124: Save the female libber stuff for your Women’s Institute friends.
2019		Times Mag. 26 Jan. 51: A closing speech delivered by a women’s libber.

2. a member of any liberation group.

1975

New Statesman 28 Mar. 424: Ms Kavan’s bleak forays among ghastly freakers-out and assorted libbers.