From Wiktionary, the free dictionary
cunt lips pl (plural only)
- (slang, vulgar) The labia majora.
1992, Letters to Penthouse III: Hot, Bothered, and Ready[1], Warner Books, published 2007, →ISBN:I wanted to make her come before she did it herself, and slid down the bed until my mouth was on her tender cunt lips.
2002, Inga Musico, Cunt: A Declaration of Independence, Seal Press, →ISBN, page 70:Hold your cunt lips apart with two fingers of one hand. Insert the speculum sideways, longest handle facing your body.
2008, Mitzi Szereto, editor, The New Black Lace Book of Women's Sexual Fantasies, Black Lace, →ISBN, page 121:I drop my head back again, close my eyes and, wrapping my arms under my legs just behind my ankles, I pull my cunt lips apart as wide as I can.