one-upwomanship
(wun.up.WOOM.un.ship; OO as in foot)
noun.
The practice of one woman trying to do better than or to prove herself superior to another woman.
Example Citation:
Russia had already had a female cosmonaut, Valentina Tereshkova, in orbit in 1963 and, in a further show of one-up-womanship, had a second, Svetlana Savitskaya, seven months before Ride.
—Susan Kurosawa, "ScreenWatch — Sally go round the stars," The Australian, January 24, 2002
Earliest Citation:
"My Old Lady" is a tour de force of feminist one-upwomanship.
—Jennefer Hirshberg, "Chapin's 'Dance Band on the Titanic': A Microcosm of Life," The Washington Post, October 26, 1977
Notes:
This word is an obvious play on one-upmanship, which was first recorded in 1952. It's so obvious, in fact, that I'm sure its first usage must have appeared not long after one-upmanship's debut. Still, the earliest citation I could find is only from 1977.
